Remove option to configure multiPartyMeeting server, use window.location.hostname

app/src/urlFactory.js

@@ -1,14 +1,12 @@
 export function getSignalingUrl(peerId, roomId)
 {
-	const hostname = window.config.multipartyServer;
-	
 	const port =
 		process.env.NODE_ENV !== 'production' ?
 			window.config.developmentPort
 			:
 			window.config.productionPort;
 
-	const url = `wss://${hostname}:${port}/?peerId=${peerId}&roomId=${roomId}`;
+	const url = `wss://${window.location.hostname}:${port}/?peerId=${peerId}&roomId=${roomId}`;
 
 	return url;
 }