Bootstrap and Jquery setup for phoenix projects

webpack.config.js

const path = require('path');
const webpack = require('webpack');

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: './js/app.js',
  output: {
    filename: 'app.js',
    path: path.resolve(__dirname, '../priv/static/js')
  },
  module: {
    rules: [{
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader'
        }
      },
      {
        test: /\.(css|sass|scss)$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              importLoaders: 2,
              sourceMap: true
            }
          },
          {
            loader: 'postcss-loader',
            options: {
              plugins: () => [
                require('autoprefixer')
              ],
              sourceMap: true
            }
          },
          {
            loader: 'sass-loader',
            options: {
              sourceMap: true
            }
          }
        ]
      },
      {  
        test: /\.(jpe?g|png|gif|svg)$/i,
        use: [
          'file-loader?hash=sha512&digest=hex&name=../images/[name].[ext]',
          {
            loader: 'image-webpack-loader',
            options: {
              mozjpeg: {
                progressive: true,
                quality: 65
              },
              // optipng.enabled: false will disable optipng
              optipng: {
                enabled: false,
              },
              pngquant: {
                quality: [0.65, 0.90],
                speed: 4
              },
              gifsicle: {
                interlaced: false,
              },
              bypassOnDebug: true,
              // the webp option will enable WEBP
              webp: {
                quality: 75
              }
            }
          }
        ],
      },
      {
        test: /\.(woff(2)?|ttf|eot)(\?v=\d+\.\d+\.\d+)?$/,
        use: [{
          loader: 'file-loader',
          options: {
            name: '[name].[ext]',
            outputPath: '../fonts'
          }
        }]
      }
    ]
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: '../css/app.css'
    }),
    new webpack.ProvidePlugin({
      $: 'jquery',
      jQuery: 'jquery',
      'window.jQuery': 'jquery'
    }),
    new CopyWebpackPlugin([{
      from: 'static/',
      to: '../'
    }])
  ]
});