webpack.config.js

const webpack = require("webpack");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');

const port = process.env.PORT || 3000;

module.exports = {
  // Webpack configuration goes here
  mode: "development",
  entry: "./src/index.js",
  output: {
    filename: "bundle.[hash].js",
  },
  devtool: "inline-source-map",
  module: {
    rules: [
      // First Rule
      {
        test: /\.(js)$/,
        exclude: /node_modules/,
        use: ["babel-loader"],
      },

      // Second Rule
      {
        test: /\.css$/,
        use: ["style-loader", "css-loader"],
      },
    ],
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: "index.html",
      // favicon: 'public/favicon.ico'
    }),
  ],
  devServer: {
    host: "localhost",
    port: port,
    historyApiFallback: true,
    open: true,
  },
  optimization: {
    minimizer: [new UglifyJsPlugin()],
  }
};