Fix webpack config for prod, add IP address of server

webpack.config.js

@@ -10,7 +10,7 @@ if (process.env.DEV) {
   require('dotenv').config({path: __dirname + '/.env'});
 }
 
-const JOJOAPPS_SERVER = 'localhost';
+const JOJOAPPS_SERVER = '149.91.81.94';
 const JOJOAPPS_SERVER_PORT = 2610;
 
 // Env variables have effect in app : main.js & socket-service.js & index.html