fix: Frontend proxy uses pounce-backend in production

- next.config.js now detects NODE_ENV=production
- Uses http://pounce-backend:8000 in Docker instead of localhost
- Logs backend URL during build for debugging

frontend/next.config.js

@@ -161,8 +161,12 @@ const nextConfig = {
   // 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
+    // In production (Docker), use internal container hostname
-    const backendUrl = process.env.BACKEND_URL || 'http://127.0.0.1:8000'
+    // In development, use localhost
+    const isProduction = process.env.NODE_ENV === 'production'
+    const backendUrl = process.env.BACKEND_URL || (isProduction ? 'http://pounce-backend:8000' : 'http://127.0.0.1:8000')
+    
+    console.log(`[Next.js Config] Backend URL: ${backendUrl}`)
     
     return [
       {