Updated dockerfile for new file structure

docker/nginx.conf

@@ -20,8 +20,8 @@ http {
         }
 
         # Proxy WebSocket requests
-        location /ws/ {
-            proxy_pass http://localhost:8081;  # Backend WebSocket server
+        location /io/ {
+            proxy_pass http://localhost:8081;
             proxy_http_version 1.1;
             proxy_set_header Upgrade $http_upgrade;
             proxy_set_header Connection 'upgrade';