Updated nginx and connection to support local and docker runtime

docker/nginx.conf

@@ -19,8 +19,8 @@ http {
             index  index.html index.htm;
         }
 
-        # Proxy WebSocket requests
-        location /io/ {
+        # Proxy IO requests
+        location /socket.io/ {
             proxy_pass http://localhost:8081;
             proxy_http_version 1.1;
             proxy_set_header Upgrade $http_upgrade;