Create Build for staging env

I am trying to create a seperate build for my staging environment by trying the build command to

NODE_ENV=staging react-scripts build

however the react-app-rewired build command overrides the node environment.

I am trying to add different configs for different envs.

    config.optimization = {
      splitChunks: {
        chunks: 'all',
        minSize: 30000,
        maxSize: 0,
        minChunks: 1,
        maxAsyncRequests: 5,
        maxInitialRequests: 3,
        automaticNameDelimiter: '~',
        name: true,
        cacheGroups: {
          vendors: {
            test: /[\\/]node_modules[\\/]/,
            priority: 10
          },
          default: {
            minChunks: 2,
            priority: -10,
            reuseExistingChunk: true
          }
        }
      }
    }

    config.devtool = true
    config.plugins.push(
      new CompressionWebpackPlugin({
        test: /\.js$|\.css$/,
        threshold: 1024
      }),
      new webpack.DefinePlugin({
        'process.env.NODE_ENV': JSON.stringify('staging')
      }),
      new webpack.optimize.AggressiveMergingPlugin(),
      new webpack.optimize.ModuleConcatenationPlugin()
    )
  }
  if (process.env.NODE_ENV === 'production') {
    config.optimization = {
      splitChunks: {
        chunks: 'all',
        minSize: 30000,
        maxSize: 0,
        minChunks: 1,
        maxAsyncRequests: 5,
        maxInitialRequests: 3,
        automaticNameDelimiter: '~',
        name: true,
        cacheGroups: {
          vendors: {
            test: /[\\/]node_modules[\\/]/,
            priority: 10
          },
          default: {
            minChunks: 2,
            priority: -10,
            reuseExistingChunk: true
          }
        }
      }
    }

    config.devtool = false
    config.plugins.push(
      new CompressionWebpackPlugin({
        test: /\.js$|\.css$/,
        threshold: 1024
      }),
      new webpack.DefinePlugin({
        'process.env.NODE_ENV': JSON.stringify('production')
      }),
      new webpack.optimize.AggressiveMergingPlugin(),
      new webpack.optimize.ModuleConcatenationPlugin()
    )
  }
  return config
}

If anyone can help with this or to give me an alternative way to do this

timarney / react-app-rewired

Create Build for staging env #582