Update WebSocket URL port in `connect` function for consistency with server configuration.

main.py

@@ -131,7 +131,7 @@ async def get_test_page():
                 function connect() {
                     const userId = document.getElementById('userId').value;
                     const roles = document.getElementById('roles').value;
-                    const url = `ws://localhost:8000/ws/${userId}?roles=${roles}`;
+                    const url = `ws://localhost:7860/ws/${userId}?roles=${roles}`;
 
                     ws = new WebSocket(url);