Multiple js and css file with web pack in Phoenix 1.4

webpack.config.js

// regenerate wit mix phx.server
// target location priv/statics/(js|css)
// sometime does not work well I think because of caching
// might need to play around with key names in the entry objects to see if it takes affect.

const path = require('path');
const glob = require('glob');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const CopyWebpackPlugin = require('copy-webpack-plugin');

module.exports = (env, options) => ({
  optimization: {
    minimizer: [
      new UglifyJsPlugin({ cache: true, parallel: true, sourceMap: false }),
      new OptimizeCSSAssetsPlugin({})
    ]
  },
  entry: {
      app: ['./js/app.js'].concat(glob.sync('./vendor/**/*.js')),
      manage: ['./js/manage.js'].concat(glob.sync('./vendor/**/*.js')),
  },
  output: {
    filename: '[name].js',
    path: path.resolve(__dirname, '../priv/static/js')
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader'
        }
      },
      {
        // test: /\.css$/,
        // use: [MiniCssExtractPlugin.loader, 'css-loader']
        test: /\.scss$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {}
          },
          {
            loader: 'sass-loader',
            options: {}
          }
        ]
      }
    ]
  },
  plugins: [
    new MiniCssExtractPlugin({ filename: '../css/app.css' }),
    new MiniCssExtractPlugin({ filename: '../css/manage.css' }),
    new CopyWebpackPlugin([{ from: 'static/', to: '../' }])
  ]
});