Merge branch 'fix-webpack-node-env' into 'master'

Enable webpack nodeEnv optimization

See merge request gitlab-org/gitlab-ce!20075

config/karma.config.js

@@ -15,6 +15,7 @@ function fatalError(message) {
 // disable problematic options
 webpackConfig.entry = undefined;
 webpackConfig.mode = 'development';
+webpackConfig.optimization.nodeEnv = false;
 webpackConfig.optimization.runtimeChunk = false;
 webpackConfig.optimization.splitChunks = false;
 

config/webpack.config.js

@@ -174,7 +174,6 @@ module.exports = {
   },
 
   optimization: {
-    nodeEnv: false,
     runtimeChunk: 'single',
     splitChunks: {
       maxInitialRequests: 4,