Use relative path to websocket

webroot/js/main.js

@@ -4,7 +4,7 @@ define(
 		"MessageList"
 	],
 	function(MessageList) {
-		var ws = new WebSocket("ws://localhost:8080/entry");
+		var ws = new WebSocket("ws://" + location.host + "/entry");
 		var list = new MessageList(ws);
 		ko.applyBindings(list);
 	}