Init. Map does not function and only working on backend at the moment.

node_modules/socketio/index.js

@@ -0,0 +1,15 @@
+var app = require('express')();
+var http = require('http').Server(app);
+var io = require('socket.io')(http);
+
+app.get('/', function(req, res){
+  res.sendfile('index.html');
+});
+
+io.on('connection', function(socket){
+  console.log('a user connected');
+});
+
+http.listen(3000, function(){
+  console.log('listening on *:3000');
+});