Add deployment documentation and enhance project setup scripts

- Introduced `DEPLOYMENT.md` for comprehensive deployment instructions.
- Added `start.bat` and `start.sh` scripts for unified project startup on Windows and Linux/Mac.
- Updated `.gitignore` to exclude additional files and directories.
- Enhanced `main.py` to serve static frontend files and handle SPA routing.
- Configured Vite to output the frontend build to the backend public directory.
- Minor adjustments in `ReviewDetail.tsx` for improved data handling.

frontend/vite.config.ts

@@ -4,6 +4,10 @@ import react from '@vitejs/plugin-react'
 // https://vitejs.dev/config/
 export default defineConfig({
   plugins: [react()],
+  build: {
+    outDir: '../backend/public',
+    emptyOutDir: true,
+  },
   server: {
     port: 5173,
     proxy: {