How to use the hops-config.envVars function in hops-config

}),
    ],
  },
  plugins: [
    new StatsWriterPlugin({ fields: null }),
    new ServiceWorkerPlugin(),
    new MiniCSSExtractPlugin({
      filename: getAssetPath('[name]-[contenthash:16].css'),
    }),
    new webpack.HashedModuleIdsPlugin(),
    new webpack.EnvironmentPlugin(
      Object.assign(
        {
          NODE_ENV: 'production',
        },
        hopsConfig.envVars
      )
    ),
    new webpack.optimize.ModuleConcatenationPlugin(),
  ],
  performance: {
    assetFilter: function(assetFilename) {
      return assetFilename !== 'stats.json' && !/\.map$/.test(assetFilename);
    },
  },
};

},
  plugins: [
    new StatsWriterPlugin({ fields: null }),
    new ServiceWorkerPlugin(),
    new ExtractTextPlugin({
      filename: getAssetPath('[name]-[contenthash:16].css'),
      allChunks: true,
      ignoreOrder: true,
    }),
    new webpack.HashedModuleIdsPlugin(),
    new webpack.EnvironmentPlugin(
      Object.assign(
        {
          NODE_ENV: 'production',
        },
        hopsConfig.envVars
      )
    ),
    new webpack.optimize.ModuleConcatenationPlugin(),
  ],
  performance: {
    assetFilter: function(assetFilename) {
      return assetFilename !== 'stats.json' && !/\.map$/.test(assetFilename);
    },
  },
};

},
  context: hopsConfig.appDir,
  resolve: require('../sections/resolve')('develop'),
  module: {
    rules: require('../sections/module-rules')('develop'),
  },
  plugins: [
    new ServiceWorkerPlugin(),
    new webpack.HotModuleReplacementPlugin(),
    new webpack.NamedModulesPlugin(),
    new webpack.EnvironmentPlugin(
      Object.assign(
        {
          NODE_ENV: 'development',
        },
        hopsConfig.envVars
      )
    ),
  ],
  performance: {
    hints: false,
  },
  devtool: 'cheap-module-eval-source-map',
  watchOptions: {
    aggregateTimeout: 300,
    ignored: /node_modules/,
  },
};

whitelist: shouldIncludeExternalModuleInBundle,
    }),
  ],
  module: {
    rules: require('../sections/module-rules')('node'),
  },
  plugins: [
    new webpack.optimize.LimitChunkCountPlugin({
      maxChunks: 1,
    }),
    new webpack.EnvironmentPlugin(
      Object.assign(
        {
          NODE_ENV: 'development',
        },
        hopsConfig.envVars
      )
    ),
  ],
  performance: {
    hints: false,
  },
  devtool: process.env.NODE_ENV !== 'production' && '#inline-source-map',
  optimization: {
    minimizer: [],
  },
};