Add enhanced request logging for debugging

- Log User-Agent to identify health checks vs real requests
- Add specific logging for asset requests and index.html serving
- Help diagnose why assets aren't loading in HF Spaces

crossword-app/backend/src/app.js

@@ -53,7 +53,7 @@ app.use(express.json({ limit: '10mb' }));
 app.use(express.urlencoded({ extended: true, limit: '10mb' }));
 
 app.use((req, res, next) => {
-  console.log(`${new Date().toISOString()} - ${req.method} ${req.path}`);
+  console.log(`${new Date().toISOString()} - ${req.method} ${req.path} - User-Agent: ${req.get('User-Agent')?.substring(0, 50) || 'unknown'}`);
   next();
 });
 
@@ -76,8 +76,15 @@ if (process.env.NODE_ENV === 'production') {
   
   app.use(express.static(staticPath));
   
+  // Log static file requests specifically
+  app.use('/assets/*', (req, res, next) => {
+    console.log(`Asset request: ${req.path}`);
+    next();
+  });
+  
   // Handle React Router routes - serve index.html for non-API routes
   app.get('*', (req, res) => {
+    console.log(`Serving index.html for: ${req.path}`);
     res.sendFile(path.join(staticPath, 'index.html'));
   });
 } else {