Add CORS middleware and user database schema

- Implemented CORS middleware in the project to handle cross-origin requests.
- Added necessary files for the CORS package including README, LICENSE, and history documentation.
- Created a SQL schema for the users table with appropriate fields and constraints.
- Inserted mock data into the users table for testing purposes.

client/src/App.tsx

@@ -1,35 +1,66 @@
-import { useState } from 'react'
-import reactLogo from './assets/react.svg'
-import viteLogo from '/vite.svg'
-import './App.css'
+import React, { useState } from "react";
+import "./App.css";
 
 function App() {
-  const [count, setCount] = useState(0)
+  const [username, setUsername] = useState("");
+  const [password, setPassword] = useState("");
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault();
+
+    try {
+      const response = await fetch("http://localhost:5002/api/login", {
+        method: "POST",
+        headers: {
+          "Content-Type": "application/json",
+        },
+        body: JSON.stringify({
+          username,
+          password,
+        }),
+      });
+
+      if (response.ok) {
+        console.log("Login successful");
+        // Handle successful login here
+      } else {
+        console.log("Login failed");
+        // Handle login error here
+      }
+    } catch (error) {
+      console.error("Login error:", error);
+    }
+  };
 
   return (
     <>
-      <div>
-        <a href="https://vite.dev" target="_blank">
-          <img src={viteLogo} className="logo" alt="Vite logo" />
-        </a>
-        <a href="https://react.dev" target="_blank">
-          <img src={reactLogo} className="logo react" alt="React logo" />
-        </a>
-      </div>
-      <h1>Vite + React</h1>
-      <div className="card">
-        <button onClick={() => setCount((count) => count + 1)}>
-          count is {count}
-        </button>
-        <p>
-          Edit <code>src/App.tsx</code> and save to test HMR
-        </p>
-      </div>
-      <p className="read-the-docs">
-        Click on the Vite and React logos to learn more
-      </p>
+      <form onSubmit={handleSubmit}>
+        <div>
+          <label htmlFor="username">Username:</label>
+          <input
+            type="text"
+            id="username"
+            name="username"
+            value={username}
+            onChange={(e) => setUsername(e.target.value)}
+            required
+          />
+        </div>
+        <div>
+          <label htmlFor="password">Password:</label>
+          <input
+            type="password"
+            id="password"
+            name="password"
+            value={password}
+            onChange={(e) => setPassword(e.target.value)}
+            required
+          />
+        </div>
+        <button type="submit">Login</button>
+      </form>
     </>
-  )
+  );
 }
 
-export default App
+export default App;