webpack.config.js

const HtmlWebPackPlugin = require('html-webpack-plugin');
const path = require('path');
const Dotenv = require('dotenv-webpack');

const htmlPlugin = new HtmlWebPackPlugin({
  template: './src/index.html',
  filename: './index.html',
});
module.exports = {
  entry: './src/index.jsx',
  output: { // NEW
    path: path.join(__dirname, 'dist'),
    filename: '[name].js',
  }, // NEW Ends
  plugins: [htmlPlugin, new Dotenv()],
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
        },
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader'],
      },
      {
        test: /\.(png|svg|jpg|gif|wav|mp3|eot|ttf|woff|woff2)$/,
        use: [
          'file-loader',
        ],
      },
      {
        test: /\.(xml)$/,
        use: [
          'xml-loader',
        ],
      },
      {
        test: /\.(glsl)$/,
        use: [
          'webpack-glsl-loader',
        ],
      },
    ],
  },
  resolve: {
    extensions: ['.js', '.jsx'],
  },
};