Add Next.js API rewrite proxy

- Added rewrites() in next.config.js to proxy /api/v1/* to backend
- Works regardless of whether Nginx is in front or external proxy goes directly to Next.js
- Disabled standalone output for non-Docker deployments

frontend/next.config.js

@@ -1,7 +1,21 @@
 /** @type {import('next').NextConfig} */
 const nextConfig = {
   reactStrictMode: true,
-  output: 'standalone', // Required for Docker deployment
+  // output: 'standalone', // Only needed for Docker deployment
+  
+  // Proxy API requests to backend
+  // This ensures /api/v1/* works regardless of how the server is accessed
+  async rewrites() {
+    // Determine backend URL based on environment
+    const backendUrl = process.env.BACKEND_URL || 'http://127.0.0.1:8000'
+    
+    return [
+      {
+        source: '/api/v1/:path*',
+        destination: `${backendUrl}/api/v1/:path*`,
+      },
+    ]
+  },
 }
 
 module.exports = nextConfig