webpack.config.js

const path = require("path");
const HtmlWebpackPlugin = require("html-webpack-plugin");
const CompressionPlugin = require("compression-webpack-plugin");

module.exports = {
  entry: "./src/index.js",
  output: {
    filename: "main.js",
    path: path.resolve(__dirname, "build"),
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: path.join(__dirname, "public", "index.html"),
      favicon: './public/favicon.gif'
    }),
    new CompressionPlugin({test: /\.js(\?.*)?$/i,})
  ],
  devServer: {
    static: {
      directory: path.join(__dirname, "public")
    },
    compress: true,
    port: 3000,
  },
  module: {
    rules: [
      {
        test: /\.jsx?$/,
        exclude: /node_modules/,
        use: {
          loader: "babel-loader"
        }
      },
      {
        test: /\.module\.s?css$/,
        use: [
          "style-loader",
          {
            loader: "css-loader",
            options: {
              modules: {
                localIdentName: "[local]--[hash:base64:5]",
              }
            }
          },
          "sass-loader",
        ],
      },
      {
        test: /\.s?css$/,
        exclude: /\.module\.s?css$/,
        use: [
          "style-loader",
          {
            loader: "css-loader",
            options: {
              modules: 'icss'
            }
          },
          "sass-loader",
        ],
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: ["file-loader"]
      }
    ]
  },
  resolve: {
    extensions: ["*", ".js", ".jsx"],
  }
};