removed hard-coded value

app/templates/auth/SignUp.html

@@ -8,7 +8,7 @@
 
 <script>
     console.info('Room ID: {{ room_id }}');
-    var socket = io.connect('http://' + document.domain + ':' + location.port);
+    var socket = io.connect();
 
     socket.on( 'connect', function() {
         autofill_form("{{ username }}", "{{ fullname }}", "{{ email }}");