use relative path for socket.io

CHANGELOG.md

@@ -30,6 +30,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Fix regression in currentweather module causing 'undefined' to show up when config.hideTemp is false
 - Fix FEELS translation for Croatian
 - Fixed weather tests [#1840](https://github.com/MichMich/MagicMirror/issues/1840)
+- Fixed Socket.io can't be used with Reverse Proxy in serveronly mode [#1934](https://github.com/MichMich/MagicMirror/issues/1934)
 - Fix update checking skipping 3rd party modules the first time
 
 ### Updated

index.html

@@ -37,7 +37,7 @@
 		<div class="region bottom right"><div class="container"></div></div>
 	</div>
 	<div class="region fullscreen above"><div class="container"></div></div>
-	<script type="text/javascript" src="/socket.io/socket.io.js"></script>
+	<script type="text/javascript" src="socket.io/socket.io.js"></script>
 	<script type="text/javascript" src="vendor/node_modules/nunjucks/browser/nunjucks.min.js"></script>
 	<script type="text/javascript" src="js/defaults.js"></script>
 	<script type="text/javascript" src="#CONFIG_FILE#"></script>

js/socketclient.js

@@ -8,7 +8,9 @@ var MMSocket = function(moduleName) {
 	self.moduleName = moduleName;
 
 	// Private Methods
-	self.socket = io("/" + self.moduleName);
+	self.socket = io("/" + self.moduleName, {
+		path: window.location.pathname + "socket.io"
+	});
 	var notificationCallback = function() {};
 
 	var onevent = self.socket.onevent;