webpack.config.js

const path = require('path');
const CopyWebpackPlugin = require('copy-webpack-plugin');

module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js'
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env']
          }
        }
      },
      {
        test: /\.(mp3|wav)$/,
        use: [
          {
            loader: 'file-loader',
            options: {
              name: '[name].[ext]',
              outputPath: 'assets/'
            }
          }
        ]
      },
      {
        test: /\.(glsl|vs|fs|vert|frag)$/,
        exclude: /node_modules/,
        use: [
          'raw-loader',
          'glslify-loader'
        ]
      }
    ]
  },
  plugins: [
    new CopyWebpackPlugin({
      'patterns':[
        { from: 'src/assets', to: 'assets' }, 
        { from: 'src/CNAME', toType: 'file', to: 'CNAME'}
      ]})
  ],
  devServer: {
    static: {
      directory: path.join(__dirname, 'dist'),
    },
    compress: true,
    port: 9000,
    hot: true,
  },
  mode: 'development',
  devtool: 'eval-source-map',
  resolve: {
    alias: {
      'three': path.resolve('./node_modules/three')
    }
  }
};