change the url to the site and not localhost

server/index.html

@@ -60,7 +60,7 @@
         enableSnippets: true,
         enableLiveAutocompletion: false
     });
-  var ws = new WebSocket('ws://localhost:8080/');
+  var ws = new WebSocket('ws://'+window.location.host+':8080/');
 //  ws.onopen = function() {
 //      };
 //      ws.onclose = function() {