listen on localhost (#5132)

* listen on localhost and open in browser

* remove open: true

Author: vincentfretin

webpack.config.js

@@ -13,7 +13,6 @@ module.exports = {
   devtool: 'source-map',
   mode: 'development',
   devServer: {
-    host: 'local-ip',
     port: process.env.PORT || 9000,
     hot: false,
     liveReload: true,