refactor: change backend to typescript and update types and variables accordingly

backend/vite.config.ts

@@ -0,0 +1,32 @@
+import {defineConfig} from 'vite'
+import path from 'path'
+import {dirname} from "node:path";
+import {fileURLToPath} from "node:url";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+
+export default defineConfig({
+    root: 'src',
+    build: {
+        outDir: '../dist',
+        emptyOutDir: true,
+        sourcemap: true,
+        minify: 'esbuild', // Use esbuild for minification (default)
+        assetsDir: 'assets',
+        rollupOptions: {
+            input: path.resolve(__dirname, 'src/index.html'),
+            output: {
+                assetFileNames: 'assets/[name]-[hash][extname]' // Hashing for cache busting
+            }
+        }
+    },
+    resolve: {
+        alias: {
+            '@': path.resolve(__dirname, 'src'), // Optional alias for cleaner imports
+        }
+    },
+    define: {
+        'process.env.NODE_ENV': '"production"' // Inject environment variables
+    }
+})