ReadMe port fix

README.md

@@ -83,7 +83,7 @@ class MyChat implements MessageComponentInterface {
 
 ```javascript
     // Then some JavaScript in the browser:
-    var conn = new WebSocket('ws://localhost/echo');
+    var conn = new WebSocket('ws://localhost:8080/echo');
     conn.onmessage = function(e) { console.log(e.data); };
     conn.send('Hello Me!');
 ```