improved design of email

README.md

@@ -1,7 +1,73 @@
 # Borrow System
 
-**You have reached the `debian12` branch.**
+![React](https://img.shields.io/badge/React-20232A?logo=react&logoColor=61DAFB)
+![TypeScript](https://img.shields.io/badge/TypeScript-3178C6?logo=typescript&logoColor=white)
+![Vite](https://img.shields.io/badge/Vite-646CFF?logo=vite&logoColor=white)
+![TailwindCSS](https://img.shields.io/badge/Tailwind_CSS-38B2AC?logo=tailwind-css&logoColor=white)
+![Node.js](https://img.shields.io/badge/Node.js-339933?logo=node.js&logoColor=white)
+![Express](https://img.shields.io/badge/Express-000000?logo=express&logoColor=white)
+![MySQL](https://img.shields.io/badge/MySQL-4479A1?logo=mysql&logoColor=white)
+![Docker](https://img.shields.io/badge/Docker-2496ED?logo=docker&logoColor=white)
+![JWT](https://img.shields.io/badge/JWT-000000?logo=jsonwebtokens&logoColor=white)
 
-Here you will find the source code of exactly the application that I have hosted.
+A small full‑stack system to log in, view available items, reserve them for a time window, and manage personal loans.
 
-The main branch or the branch that I am developing on, is the `dev` branch.
+- Frontend: React + TypeScript + Vite + Tailwind CSS
+- Backend: Node.js + Express + MySQL + JWT (jose)
+- Orchestration: Docker Compose (backend + MySQL)
+
+## Contents
+
+- Frontend: [frontend/](frontend)
+  - Vite/Tailwind config: [frontend/vite.config.ts](frontend/vite.config.ts), [frontend/tailwind.config.js](frontend/tailwind.config.js)
+  - App entry: [frontend/src/main.tsx](frontend/src/main.tsx), [frontend/src/App.tsx](frontend/src/App.tsx)
+  - UI: [frontend/src/layout/Layout.tsx](frontend/src/layout/Layout.tsx), [frontend/src/components](frontend/src/components)
+  - Data/utilities: [frontend/src/utils/fetchData.ts](frontend/src/utils/fetchData.ts), [frontend/src/utils/userHandler.ts](frontend/src/utils/userHandler.ts), [frontend/src/utils/toastify.ts](frontend/src/utils/toastify.ts)
+- Backend: [backend/](backend)
+  - Server: [backend/server.js](backend/server.js)
+  - Routes: [backend/routes/api.js](backend/routes/api.js), [backend/routes/apiV2.js](backend/routes/apiV2.js)
+  - DB + services: [backend/services/database.js](backend/services/database.js), [backend/services/tokenService.js](backend/services/tokenService.js)
+  - Schema/seed: [backend/scheme.sql](backend/scheme.sql)
+- Docs: [docs/](docs)
+  - API docs (see below): [docs/backend_API_docs/README.md](docs/backend_API_docs/README.md)
+
+## Features (high‑level)
+
+- Auth via JWT (login -> token cookie) using the backend route in [backend/routes/api.js](backend/routes/api.js).
+- After login, the app loads items, loans, and user loans and keeps them in localStorage.
+- Choose a date range to fetch borrowable items, select items, and create a loan.
+- Manage personal loans list (and delete a loan).
+
+Key frontend utilities:
+
+- [`utils.fetchData.fetchAllData`](frontend/src/utils/fetchData.ts): loads items, loans, and user loans after login.
+- [`utils.fetchData.getBorrowableItems`](frontend/src/utils/fetchData.ts): fetches borrowable items for the selected time range.
+- [`utils.userHandler.createLoan`](frontend/src/utils/userHandler.ts): creates a new loan for selected items.
+- [`utils.userHandler.handleDeleteLoan`](frontend/src/utils/userHandler.ts): deletes a loan and syncs local state.
+- [`utils.toastify.myToast`](frontend/src/utils/toastify.ts): toast notifications.
+
+UI flow (main screens):
+
+- Period selection: [frontend/src/components/Form1.tsx](frontend/src/components/Form1.tsx)
+- Borrowable items + selection: [frontend/src/components/Form2.tsx](frontend/src/components/Form2.tsx)
+- User loans table: [frontend/src/components/Form4.tsx](frontend/src/components/Form4.tsx)
+
+## Development
+
+- Scripts: see [frontend/package.json](frontend/package.json) and [backend/package.json](backend/package.json)
+  - Frontend: `npm run dev`, `npm run build`, `npm run preview`, `npm run lint`
+  - Backend: `npm start`
+- Linting: ESLint configured via [frontend/eslint.config.js](frontend/eslint.config.js)
+- TypeScript configs: [frontend/tsconfig.app.json](frontend/tsconfig.app.json), [frontend/tsconfig.node.json](frontend/tsconfig.node.json)
+
+## Configuration notes
+
+- Vite/Tailwind integration via [frontend/vite.config.ts](frontend/vite.config.ts) and `@tailwindcss/vite`; CSS entry uses `@import "tailwindcss"` in [frontend/src/index.css](frontend/src/index.css).
+- Toasts wired in [frontend/src/main.tsx](frontend/src/main.tsx) with `react-toastify`.
+- Local state is stored in `localStorage` keys: `allItems`, `allLoans`, `userLoans`, `borrowableItems`. Cross‑component updates are signaled via window events from [`utils.fetchData`](frontend/src/utils/fetchData.ts).
+
+## API documentation
+
+Refer to the dedicated API docs:
+
+`docs/backend_API_docs/README.md`

admin/src/Layout/Layout.tsx

@@ -5,6 +5,11 @@ import Login from "./Login";
 import Cookies from "js-cookie";
 import Landingpage from "@/components/API/Landingpage";
 
+const API_BASE =
+  (import.meta as any).env?.VITE_BACKEND_URL ||
+  import.meta.env.VITE_BACKEND_URL ||
+  "http://localhost:8002";
+
 const Layout: React.FC = () => {
   const [isLoggedIn, setIsLoggedIn] = useState(false);
   const [showAPI, setShowAPI] = useState(false);
@@ -19,7 +24,7 @@ const Layout: React.FC = () => {
 
     if (Cookies.get("token")) {
       const verifyToken = async () => {
-        const response = await fetch("https://backend.insta.the1s.de/api/verifyToken", {
+        const response = await fetch(`${API_BASE}/api/verifyToken`, {
           method: "GET",
           headers: {
             Authorization: `Bearer ${Cookies.get("token")}`,

admin/src/components/API/Landingpage.tsx

@@ -14,6 +14,11 @@ import { Lock, LockOpen } from "lucide-react";
 import MyAlert from "../myChakra/MyAlert";
 import { formatDateTime } from "@/utils/userFuncs";
 
+const API_BASE =
+  (import.meta as any).env?.VITE_BACKEND_URL ||
+  import.meta.env.VITE_BACKEND_URL ||
+  "http://localhost:8002";
+
 type Loan = {
   id: number;
   username: string;
@@ -57,9 +62,7 @@ const Landingpage: React.FC = () => {
     const fetchData = async () => {
       setIsLoading(true);
       try {
-        const loanRes = await fetch(
+        const loanRes = await fetch(`${API_BASE}/apiV2/allLoans`);
-          "https://backend.insta.the1s.de/apiV2/allLoans"
-        );
         const loanData = await loanRes.json();
         if (Array.isArray(loanData)) {
           setLoans(loanData);
@@ -71,9 +74,7 @@ const Landingpage: React.FC = () => {
           );
         }
 
-        const deviceRes = await fetch(
+        const deviceRes = await fetch(`${API_BASE}/apiV2/allItems`);
-          "https://backend.insta.the1s.de/apiV2/allItems"
-        );
         const deviceData = await deviceRes.json();
         if (Array.isArray(deviceData)) {
           setDevices(deviceData);

admin/src/components/APIKeyTable.tsx

@@ -18,6 +18,11 @@ import { deleteAPKey } from "@/utils/userActions";
 import AddAPIKey from "./AddAPIKey";
 import { formatDateTime } from "@/utils/userFuncs";
 
+const API_BASE =
+  (import.meta as any).env?.VITE_BACKEND_URL ||
+  import.meta.env.VITE_BACKEND_URL ||
+  "http://localhost:8002";
+
 type Items = {
   id: number;
   apiKey: string;
@@ -51,7 +56,7 @@ const APIKeyTable: React.FC = () => {
     const fetchData = async () => {
       setIsLoading(true);
       try {
-        const response = await fetch("https://backend.insta.the1s.de/api/apiKeys", {
+        const response = await fetch(`${API_BASE}/api/apiKeys`, {
           method: "GET",
           headers: {
             Authorization: `Bearer ${Cookies.get("token")}`,

admin/src/components/AddItemForm.tsx

@@ -33,7 +33,7 @@ const AddItemForm: React.FC<AddItemFormProps> = ({ onClose, alert }) => {
               <Input
                 id="can_borrow_role"
                 type="number"
-                placeholder="Zahl (z.B. 2)"
+                placeholder="Zahl (1 - 4)"
               />
             </Field.Root>
           </Stack>

admin/src/components/ItemTable.tsx

@@ -31,6 +31,11 @@ import {
 import AddItemForm from "./AddItemForm";
 import { formatDateTime } from "@/utils/userFuncs";
 
+const API_BASE =
+  (import.meta as any).env?.VITE_BACKEND_URL ||
+  import.meta.env.VITE_BACKEND_URL ||
+  "http://localhost:8002";
+
 type Items = {
   id: number;
   item_name: string;
@@ -77,7 +82,7 @@ const ItemTable: React.FC = () => {
     const fetchData = async () => {
       setIsLoading(true);
       try {
-        const response = await fetch("https://backend.insta.the1s.de/api/allItems", {
+        const response = await fetch(`${API_BASE}/api/allItems`, {
           method: "GET",
           headers: {
             Authorization: `Bearer ${Cookies.get("token")}`,

admin/src/components/LoanTable.tsx

@@ -18,6 +18,11 @@ import { formatDateTime } from "@/utils/userFuncs";
 import { Trash2, RefreshCcwDot } from "lucide-react";
 import { deleteLoan } from "@/utils/userActions";
 
+const API_BASE =
+  (import.meta as any).env?.VITE_BACKEND_URL ||
+  import.meta.env.VITE_BACKEND_URL ||
+  "http://localhost:8002";
+
 const LoanTable: React.FC = () => {
   const [items, setItems] = useState<Loan[]>([]);
   const [errorStatus, setErrorStatus] = useState<"error" | "success">("error");
@@ -55,7 +60,7 @@ const LoanTable: React.FC = () => {
     const fetchData = async () => {
       setIsLoading(true);
       try {
-        const response = await fetch("https://backend.insta.the1s.de/api/allLoans", {
+        const response = await fetch(`${API_BASE}/api/allLoans`, {
           method: "GET",
           headers: {
             Authorization: `Bearer ${Cookies.get("token")}`,

admin/src/utils/fetcher.ts

@@ -1,7 +1,12 @@
 import Cookies from "js-cookie";
 
+const API_BASE =
+  (import.meta as any).env?.VITE_BACKEND_URL ||
+  import.meta.env.VITE_BACKEND_URL ||
+  "http://localhost:8002";
+
 export const fetchUserData = async () => {
-  const response = await fetch("https://backend.insta.the1s.de/api/allUsers", {
+  const response = await fetch(`${API_BASE}/api/allUsers`, {
     headers: {
       Authorization: `Bearer ${Cookies.get("token")}`,
     },

admin/src/utils/loginUser.ts

@@ -1,5 +1,10 @@
 import Cookies from "js-cookie";
 
+const API_BASE =
+  (import.meta as any).env?.VITE_BACKEND_URL ||
+  import.meta.env.VITE_BACKEND_URL ||
+  "http://localhost:8002";
+
 export type LoginSuccess = { success: true };
 export type LoginFailure = {
   success: false;
@@ -13,7 +18,7 @@ export const loginFunc = async (
   password: string
 ): Promise<LoginResult> => {
   try {
-    const response = await fetch("https://backend.insta.the1s.de/api/loginAdmin", {
+    const response = await fetch(`${API_BASE}/api/loginAdmin`, {
       method: "POST",
       headers: { "Content-Type": "application/json" },
       body: JSON.stringify({ username, password }),

admin/src/utils/userActions.ts

@@ -1,9 +1,14 @@
 import Cookies from "js-cookie";
 
+const API_BASE =
+  (import.meta as any).env?.VITE_BACKEND_URL ||
+  import.meta.env.VITE_BACKEND_URL ||
+  "http://localhost:8002";
+
 export const handleDelete = async (userId: number) => {
   try {
     const response = await fetch(
-      `https://backend.insta.the1s.de/api/deleteUser/${userId}`,
+      `${API_BASE}/api/deleteUser/${userId}`,
       {
         method: "DELETE",
         headers: {
@@ -28,7 +33,7 @@ export const handleEdit = async (
 ) => {
   try {
     const response = await fetch(
-      `https://backend.insta.the1s.de/api/editUser/${userId}`,
+      `${API_BASE}/api/editUser/${userId}`,
       {
         method: "POST",
         headers: {
@@ -54,17 +59,14 @@ export const createUser = async (
   password: string
 ) => {
   try {
-    const response = await fetch(
+    const response = await fetch(`${API_BASE}/api/createUser`, {
-      `https://backend.insta.the1s.de/api/createUser`,
-      {
       method: "POST",
       headers: {
         "Content-Type": "application/json",
         Authorization: `Bearer ${Cookies.get("token")}`,
       },
       body: JSON.stringify({ username, role, password }),
-      }
+    });
-    );
     if (!response.ok) {
       throw new Error("Failed to create user");
     }
@@ -77,17 +79,14 @@ export const createUser = async (
 
 export const changePW = async (newPassword: string, username: string) => {
   try {
-    const response = await fetch(
+    const response = await fetch(`${API_BASE}/api/changePWadmin`, {
-      `https://backend.insta.the1s.de/api/changePWadmin`,
-      {
       method: "POST",
       headers: {
         "Content-Type": "application/json",
         Authorization: `Bearer ${Cookies.get("token")}`,
       },
       body: JSON.stringify({ newPassword, username }),
-      }
+    });
-    );
     if (!response.ok) {
       throw new Error("Failed to change password");
     }
@@ -101,7 +100,7 @@ export const changePW = async (newPassword: string, username: string) => {
 export const deleteLoan = async (loanId: number) => {
   try {
     const response = await fetch(
-      `https://backend.insta.the1s.de/api/deleteLoan/${loanId}`,
+      `${API_BASE}/api/deleteLoan/${loanId}`,
       {
         method: "DELETE",
         headers: {
@@ -122,7 +121,7 @@ export const deleteLoan = async (loanId: number) => {
 export const deleteItem = async (itemId: number) => {
   try {
     const response = await fetch(
-      `https://backend.insta.the1s.de/api/deleteItem/${itemId}`,
+      `${API_BASE}/api/deleteItem/${itemId}`,
       {
         method: "DELETE",
         headers: {
@@ -145,17 +144,14 @@ export const createItem = async (
   can_borrow_role: number
 ) => {
   try {
-    const response = await fetch(
+    const response = await fetch(`${API_BASE}/api/createItem`, {
-      `https://backend.insta.the1s.de/api/createItem`,
-      {
       method: "POST",
       headers: {
         "Content-Type": "application/json",
         Authorization: `Bearer ${Cookies.get("token")}`,
       },
       body: JSON.stringify({ item_name, can_borrow_role }),
-      }
+    });
-    );
     if (!response.ok) {
       return {
         success: false,
@@ -176,17 +172,14 @@ export const handleEditItems = async (
   can_borrow_role: string
 ) => {
   try {
-    const response = await fetch(
+    const response = await fetch(`${API_BASE}/api/updateItemByID`, {
-      "https://backend.insta.the1s.de/api/updateItemByID",
-      {
       method: "POST",
       headers: {
         "Content-Type": "application/json",
         Authorization: `Bearer ${Cookies.get("token")}`,
       },
       body: JSON.stringify({ itemId, item_name, can_borrow_role }),
-      }
+    });
-    );
     if (!response.ok) {
       throw new Error("Failed to edit item");
     }
@@ -200,7 +193,7 @@ export const handleEditItems = async (
 export const changeSafeState = async (itemId: number) => {
   try {
     const response = await fetch(
-      `https://backend.insta.the1s.de/api/changeSafeState/${itemId}`,
+      `${API_BASE}/api/changeSafeState/${itemId}`,
       {
         method: "PUT",
         headers: {
@@ -220,7 +213,7 @@ export const changeSafeState = async (itemId: number) => {
 
 export const createAPIentry = async (apiKey: string, user: string) => {
   try {
-    const response = await fetch(`https://backend.insta.the1s.de/api/createAPIentry`, {
+    const response = await fetch(`${API_BASE}/api/createAPIentry`, {
       method: "POST",
       headers: {
         "Content-Type": "application/json",
@@ -245,7 +238,7 @@ export const createAPIentry = async (apiKey: string, user: string) => {
 export const deleteAPKey = async (apiKeyId: number) => {
   try {
     const response = await fetch(
-      `https://backend.insta.the1s.de/api/deleteAPKey/${apiKeyId}`,
+      `${API_BASE}/api/deleteAPKey/${apiKeyId}`,
       {
         method: "DELETE",
         headers: {

admin/vite.config.ts

@@ -8,13 +8,9 @@ export default defineConfig({
   plugins: [react(), svgr(), tailwindcss(), tsconfigPaths()],
   server: {
     host: "0.0.0.0",
-    allowedHosts: ["admin.insta.the1s.de"],
+    port: 8003,
-    port: 8103,
+    watch: {
-    watch: { usePolling: true },
+      usePolling: true,
-    hmr: {
-      host: "admin.insta.the1s.de",
-      port: 8103,
-      protocol: "wss",
     },
   },
 });

backend/Dockerfile

@@ -7,6 +7,6 @@ RUN npm install
 
 COPY . .
 
-EXPOSE 8102
+EXPOSE 8002
 
 CMD ["npm", "start"]

backend/routes/api.js

@@ -38,65 +38,99 @@ function buildLoanEmail({ user, items, startDate, endDate, createdDate }) {
   const brand = process.env.MAIL_BRAND_COLOR || "#0ea5e9";
   const itemsList =
     Array.isArray(items) && items.length
-      ? `<ul style="margin:8px 0 0 16px; padding:0;">${items
+      ? `<ul style="margin:4px 0 0 18px; padding:0;">${items
-          .map((i) => `<li style="margin:4px 0;">${i}</li>`)
+          .map(
+            (i) =>
+              `<li style="margin:2px 0; color:#111827; line-height:1.3;">${i}</li>`
+          )
           .join("")}</ul>`
-      : "<span>N/A</span>";
+      : "<span style='color:#111827;'>N/A</span>";
 
   return `<!doctype html>
 <html lang="de">
-  <head>
+<head>
   <meta charset="utf-8">
-    <meta name="color-scheme" content="light dark">
+  <meta name="color-scheme" content="light">
-    <meta name="supported-color-schemes" content="light dark">
+  <meta name="supported-color-schemes" content="light">
-  </head>
+  <meta name="x-apple-disable-message-reformatting">
-  <body style="margin:0; padding:0; background:#f6f9fc; font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif; color:#111827;">
+  <meta name="viewport" content="width=device-width,initial-scale=1">
-    <div style="padding:24px;">
+  <style>
-      <table role="presentation" cellpadding="0" cellspacing="0" width="100%" style="max-width:600px; margin:0 auto; background:#ffffff; border:1px solid #e5e7eb; border-radius:12px; overflow:hidden;">
+    :root { color-scheme: light; supported-color-schemes: light; }
+    body { margin:0; padding:0; }
+    /* Mobile stacking */
+    @media (max-width:480px) {
+      .outer { width:100% !important; }
+      .pad-sm { padding:16px !important; }
+      .w-label { width:120px !important; }
+    }
+    /* Dark-mode override safety */
+    @media (prefers-color-scheme: dark) {
+      body, table, td, p, a, h1, h2, h3 { background:#ffffff !important; color:#111827 !important; }
+      .brand-header { background:${brand} !important; color:#ffffff !important; }
+      a { color:${brand} !important; }
+    }
+  </style>
+</head>
+<body bgcolor="#ffffff" style="background:#ffffff; font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Arial,sans-serif; color:#111827; -webkit-text-size-adjust:100%;">
+  <!-- Preheader (hidden) -->
+  <div style="display:none; max-height:0; overflow:hidden; opacity:0; mso-hide:all;">
+    Neue Ausleihe erstellt – Übersicht der Buchung.
+  </div>
+  <div role="article" aria-roledescription="email" lang="de" style="padding:24px; background:#f2f4f7;">
+    <table role="presentation" cellpadding="0" cellspacing="0" width="100%" class="outer" style="max-width:600px; margin:0 auto; background:#ffffff; border:1px solid #e5e7eb; border-radius:14px; overflow:hidden;">
       <tr>
-          <td style="padding:20px 24px; background:${brand}; color:#ffffff;">
+        <td class="brand-header" style="padding:22px 26px; background:${brand}; color:#ffffff;">
-            <h1 style="margin:0; font-size:18px;">Neue Ausleihe erstellt</h1>
+          <h1 style="margin:0; font-size:18px; line-height:1.35; font-weight:600;">Neue Ausleihe erstellt</h1>
         </td>
       </tr>
       <tr>
-          <td style="padding:20px 24px;">
+        <td class="pad-sm" style="padding:24px 26px; color:#111827;">
-            <p style="margin:0 0 12px 0;">Es wurde eine neue Ausleihe angelegt. Hier sind die Details:</p>
+          <p style="margin:0 0 14px 0; line-height:1.4;">Es wurde eine neue Ausleihe angelegt. Hier sind die Details:</p>
-            <table role="presentation" cellpadding="0" cellspacing="0" width="100%" style="border-collapse:collapse;">
+          <table role="presentation" cellpadding="0" cellspacing="0" width="100%" style="border-collapse:collapse; font-size:14px; line-height:1.3; background:#fcfcfd; border:1px solid #e5e7eb; border-radius:10px; overflow:hidden;">
+            <tbody>
               <tr>
-                <td style="padding:8px 0; color:#6b7280; width:180px;">Benutzer</td>
+                <td class="w-label" style="padding:10px 14px; color:#6b7280; width:170px; border-bottom:1px solid #ececec;">Benutzer</td>
-                <td style="padding:8px 0; font-weight:600;">${
+                <td style="padding:10px 14px; font-weight:600; border-bottom:1px solid #ececec; color:#111827;">${
                   user || "N/A"
                 }</td>
               </tr>
               <tr>
-                <td style="padding:8px 0; color:#6b7280; vertical-align:top;">Ausgeliehene Gegenstände</td>
+                <td style="padding:10px 14px; color:#6b7280; vertical-align:top; border-bottom:1px solid #ececec;">Ausgeliehene Gegenstände</td>
-                <td style="padding:8px 0; font-weight:600;">${itemsList}</td>
+                <td style="padding:10px 14px; font-weight:600; border-bottom:1px solid #ececec; color:#111827;">${itemsList}</td>
               </tr>
               <tr>
-                <td style="padding:8px 0; color:#6b7280;">Startdatum</td>
+                <td style="padding:10px 14px; color:#6b7280; border-bottom:1px solid #ececec;">Startdatum</td>
-                <td style="padding:8px 0; font-weight:600;">${formatDateTime(
+                <td style="padding:10px 14px; font-weight:600; border-bottom:1px solid #ececec; color:#111827;">${formatDateTime(
                   startDate
                 )}</td>
               </tr>
               <tr>
-                <td style="padding:8px 0; color:#6b7280;">Enddatum</td>
+                <td style="padding:10px 14px; color:#6b7280; border-bottom:1px solid #ececec;">Enddatum</td>
-                <td style="padding:8px 0; font-weight:600;">${formatDateTime(
+                <td style="padding:10px 14px; font-weight:600; border-bottom:1px solid #ececec; color:#111827;">${formatDateTime(
                   endDate
                 )}</td>
               </tr>
               <tr>
-                <td style="padding:8px 0; color:#6b7280;">Erstellt am</td>
+                <td style="padding:10px 14px; color:#6b7280;">Erstellt am</td>
-                <td style="padding:8px 0; font-weight:600;">${formatDateTime(
+                <td style="padding:10px 14px; font-weight:600; color:#111827;">${formatDateTime(
                   createdDate
                 )}</td>
               </tr>
+            </tbody>
           </table>
-            <p style="margin:16px 0 0 0; font-size:12px; color:#6b7280;">Diese E-Mail wurde automatisch vom Ausleihsystem gesendet. Bitte nicht antworten.</p>
+          <p style="margin:22px 0 0 0; font-size:14px;">
+            <a href="https://admin.insta.the1s.de/api" style="display:inline-block; background:${brand}; color:#ffffff; text-decoration:none; padding:10px 16px; border-radius:6px; font-weight:600; font-size:14px;" target="_blank" rel="noopener noreferrer">
+              Übersicht öffnen
+            </a>
+          </p>
+          <p style="margin:18px 0 0 0; font-size:12px; color:#6b7280; line-height:1.4;">
+            Diese E-Mail wurde automatisch vom Ausleihsystem gesendet. Bitte nicht antworten.
+          </p>
         </td>
       </tr>
     </table>
   </div>
-  </body>
+</body>
 </html>`;
 }
 
@@ -145,7 +179,6 @@ function sendMailLoan(user, items, startDate, endDate, createdDate) {
   console.log("sendMailLoan called");
 }
 
-// ...existing code...
 const formatDateTime = (value) => {
   if (value == null) return "N/A";
 
@@ -177,7 +210,6 @@ const formatDateTime = (value) => {
 
   return "N/A";
 };
-// ...existing code...
 
 router.post("/login", async (req, res) => {
   const result = await loginFunc(req.body.username, req.body.password);
@@ -193,7 +225,6 @@ router.post("/login", async (req, res) => {
 });
 
 router.get("/items", authenticate, async (req, res) => {
-  console.log(req);
   const result = await getItemsFromDatabase(req.user.role);
   if (result.success) {
     res.status(200).json(result.data);

backend/server.js

@@ -5,7 +5,7 @@ import apiRouter from "./routes/api.js";
 import apiRouterV2 from "./routes/apiV2.js";
 env.config();
 const app = express();
-const port = 8102;
+const port = 8002;
 
 app.use(cors());
 // Increase body size limits to support large CSV JSON payloads

backend/services/database.js

@@ -8,7 +8,6 @@ const pool = mysql
     user: process.env.DB_USER,
     password: process.env.DB_PASSWORD,
     database: process.env.DB_NAME,
-    port: process.env.DB_PORT,
   })
   .promise();
 

backend/services/tokenService.js

@@ -9,7 +9,6 @@ export async function generateToken(payload) {
     .setIssuedAt()
     .setExpirationTime("2h") // Token valid for 2 hours
     .sign(secret);
-  console.log("Generated token: ", newToken);
   return newToken;
 }
 

docker-compose.yml

@@ -1,45 +1,35 @@
 services:
-  borrow_system-frontend:
+  #  borrow_system-frontend:
-    container_name: borrow_system-frontend
+  #    container_name: borrow_system-frontend
-    build: ./frontend
+  #    build: ./frontend
-    ports:
+  #    ports:
-      - "8101:8101"
+  #      - "8001:8001"
-    networks:
+  #    environment:
-      - proxynet
+  #      - CHOKIDAR_USEPOLLING=true
-      - borrow_system-internal
+  #    volumes:
-    environment:
+  #      - ./frontend:/app
-      - CHOKIDAR_USEPOLLING=true
+  #      - /app/node_modules
-    volumes:
+  #    restart: unless-stopped
-      - ./frontend:/app
-      - /app/node_modules
-    restart: unless-stopped
 
-  admin-frontend:
+  #  admin-frontend:
-    container_name: admin-frontend
+  #    container_name: admin-frontend
-    build: ./admin
+  #    build: ./admin
-    networks:
+  #    ports:
-      - proxynet
+  #      - "8003:8003"
-      - borrow_system-internal
+  #    environment:
-    ports:
+  #      - CHOKIDAR_USEPOLLING=true
-      - "8103:8103"
+  #    volumes:
-    environment:
+  #      - ./admin:/app
-      - CHOKIDAR_USEPOLLING=true
+  #      - /app/node_modules
-    volumes:
+  #    restart: unless-stopped
-      - ./admin:/app
-      - /app/node_modules
-    restart: unless-stopped
 
   borrow_system-backend:
     container_name: borrow_system-backend
     build: ./backend
     ports:
-      - "8102:8102"
+      - "8002:8002"
-    networks:
-      - proxynet
-      - borrow_system-internal
     environment:
       DB_HOST: mysql
-      DB_PORT: 3306
       DB_USER: root
       DB_PASSWORD: ${DB_PASSWORD}
       DB_NAME: borrow_system
@@ -62,14 +52,6 @@ services:
       - ./mysql-timezone.cnf:/etc/mysql/conf.d/timezone.cnf:ro
     ports:
       - "3309:3306"
-    networks:
-      - borrow_system-internal
 
 volumes:
   mysql-data:
-
-networks:
-  proxynet:
-    external: true
-  borrow_system-internal:
-    external: false

frontend/Dockerfile

@@ -7,6 +7,6 @@ RUN npm install
 
 COPY . .
 
-EXPOSE 8101
+EXPOSE 8001
 
 CMD ["npm", "run", "dev"]

frontend/src/components/Form4.tsx

@@ -19,6 +19,11 @@ type Loan = {
   loaned_items_name: string[];
 };
 
+const API_BASE =
+  (import.meta as any).env?.VITE_BACKEND_URL ||
+  import.meta.env.VITE_BACKEND_URL ||
+  "http://localhost:8002";
+
 const formatDate = (iso: string | null) => {
   if (!iso) return "-";
   const m = iso.match(/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2})/);
@@ -28,7 +33,7 @@ const formatDate = (iso: string | null) => {
 };
 
 async function fetchUserLoans(): Promise<Loan[]> {
-  const res = await fetch("https://backend.insta.the1s.de/api/userLoans", {
+  const res = await fetch(`${API_BASE}/api/userLoans`, {
     method: "GET",
     headers: { Authorization: `Bearer ${Cookies.get("token") || ""}` },
   });

frontend/src/utils/fetchData.ts

@@ -6,6 +6,11 @@ export const ALL_ITEMS_UPDATED_EVENT = "allItemsUpdated";
 export const BORROWABLE_ITEMS_UPDATED_EVENT = "borrowableItemsUpdated";
 export const AUTH_LOGOUT_EVENT = "authLogout";
 
+const API_BASE =
+  (import.meta as any).env?.VITE_BACKEND_URL ||
+  import.meta.env.VITE_BACKEND_URL ||
+  "http://localhost:8002";
+
 let sendError = false;
 
 function logout() {
@@ -25,7 +30,7 @@ export const fetchAllData = async (token: string | undefined) => {
   if (!token) return;
   // First we fetch all items that are potentially available for borrowing
   try {
-    const response = await fetch("https://backend.insta.the1s.de/api/items", {
+    const response = await fetch(`${API_BASE}/api/items`, {
       method: "GET",
       headers: {
         Authorization: `Bearer ${token}`,
@@ -57,7 +62,7 @@ export const fetchAllData = async (token: string | undefined) => {
 
   // get all loans
   try {
-    const response = await fetch("https://backend.insta.the1s.de/api/loans", {
+    const response = await fetch(`${API_BASE}/api/loans`, {
       method: "GET",
       headers: {
         Authorization: `Bearer ${token}`,
@@ -89,7 +94,7 @@ export const fetchAllData = async (token: string | undefined) => {
 
   // get user loans
   try {
-    const response = await fetch("https://backend.insta.the1s.de/api/userLoans", {
+    const response = await fetch(`${API_BASE}/api/userLoans`, {
       method: "GET",
       headers: {
         Authorization: `Bearer ${token}`,
@@ -122,7 +127,7 @@ export const fetchAllData = async (token: string | undefined) => {
 
 export const loginUser = async (username: string, password: string) => {
   try {
-    const response = await fetch("https://backend.insta.the1s.de/api/login", {
+    const response = await fetch(`${API_BASE}/api/login`, {
       method: "POST",
       headers: {
         "Content-Type": "application/json",
@@ -158,7 +163,7 @@ export const getBorrowableItems = async () => {
   }
 
   try {
-    const response = await fetch("https://backend.insta.the1s.de/api/borrowableItems", {
+    const response = await fetch(`${API_BASE}/api/borrowableItems`, {
       method: "POST",
       headers: {
         Authorization: `Bearer ${Cookies.get("token") || ""}`,

frontend/src/utils/userHandler.ts

@@ -2,10 +2,15 @@ import { myToast } from "./toastify";
 import Cookies from "js-cookie";
 import { queryClient } from "./queryClient";
 
+const API_BASE =
+  (import.meta as any).env?.VITE_BACKEND_URL ||
+  import.meta.env.VITE_BACKEND_URL ||
+  "http://localhost:8002";
+
 export const handleDeleteLoan = async (loanID: number): Promise<boolean> => {
   try {
     const response = await fetch(
-      `https://backend.insta.the1s.de/api/deleteLoan/${loanID}`,
+      `${API_BASE}/api/deleteLoan/${loanID}`,
       {
         method: "DELETE",
         headers: {
@@ -75,17 +80,14 @@ export const rmFromRemove = (itemID: number) => {
 
 export const createLoan = async (startDate: string, endDate: string) => {
   const items = removeArr;
-  const response = await fetch(
+  const response = await fetch(`${API_BASE}/api/createLoan`, {
-    "https://backend.insta.the1s.de/api/createLoan",
-    {
     method: "POST",
     headers: {
       "Content-Type": "application/json",
       Authorization: `Bearer ${Cookies.get("token") || ""}`,
     },
     body: JSON.stringify({ items, startDate, endDate }),
-    }
+  });
-  );
 
   if (!response.ok) {
     myToast("Fehler beim Erstellen der Ausleihe", "error");
@@ -106,7 +108,7 @@ export const createLoan = async (startDate: string, endDate: string) => {
 
 export const onReturn = async (loanID: number) => {
   const response = await fetch(
-    `https://backend.insta.the1s.de/api/returnLoan/${loanID}`,
+    `${API_BASE}/api/returnLoan/${loanID}`,
     {
       method: "POST",
       headers: {
@@ -125,15 +127,12 @@ export const onReturn = async (loanID: number) => {
 };
 
 export const onTake = async (loanID: number) => {
-  const response = await fetch(
+  const response = await fetch(`${API_BASE}/api/takeLoan/${loanID}`, {
-    `https://backend.insta.the1s.de/api/takeLoan/${loanID}`,
-    {
     method: "POST",
     headers: {
       Authorization: `Bearer ${Cookies.get("token") || ""}`,
     },
-    }
+  });
-  );
 
   if (!response.ok) {
     myToast("Fehler beim Ausleihen der Ausleihe", "error");
@@ -145,17 +144,14 @@ export const onTake = async (loanID: number) => {
 };
 
 export const changePW = async (oldPassword: string, newPassword: string) => {
-  const response = await fetch(
+  const response = await fetch(`${API_BASE}/api/changePassword`, {
-    "https://backend.insta.the1s.de/api/changePassword",
-    {
     method: "POST",
     headers: {
       "Content-Type": "application/json",
       Authorization: `Bearer ${Cookies.get("token") || ""}`,
     },
     body: JSON.stringify({ oldPassword, newPassword }),
-    }
+  });
-  );
 
   if (!response.ok) {
     myToast("Fehler beim Ändern des Passworts", "error");

frontend/vite.config.ts

@@ -1,17 +1,15 @@
 import { defineConfig } from "vite";
+import react from "@vitejs/plugin-react";
+import svgr from "vite-plugin-svgr";
 import tailwindcss from "@tailwindcss/vite";
 
 export default defineConfig({
-  plugins: [tailwindcss()],
+  plugins: [react(), svgr(), tailwindcss()],
   server: {
     host: "0.0.0.0",
-    allowedHosts: ["insta.the1s.de"],
+    port: 8001,
-    port: 8101,
+    watch: {
-    watch: { usePolling: true },
+      usePolling: true,
-    hmr: {
-      host: "insta.the1s.de",
-      port: 8101,
-      protocol: "wss",
     },
   },
 });