Performance improvments (#2869)

webapp/webpack.config.js

@@ -84,6 +84,11 @@ var config = {
         new webpack.LoaderOptionsPlugin({
             minimize: !DEV,
             debug: false
+        }),
+        new webpack.DefinePlugin({
+            'process.env': {
+                NODE_ENV: JSON.stringify('production')
+            }
         })
     ],
     resolve: {