Update app.js

app.js

@@ -10,7 +10,7 @@ app.use(morgan('combined'));
 
 // Route to count hits
 app.get('/', (req, res) => {
-    const userAgent = req.headers['user-agent'];
+    const userAgent = req.headers.get('user-agent');
     
     // Increment hit only if not from fetch
     if (!userAgent || !userAgent.toLowerCase().includes('fetch')) {