webpack.config.production.js

const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');

const TerserPlugin = require('terser-webpack-plugin');

module.exports = {
  optimization: {
    minimizer: [new TerserPlugin(), new OptimizeCSSAssetsPlugin({})]
  },
  module: {
    rules: [
      {
        test: /\.s?css/,
        use: [MiniCssExtractPlugin.loader, 'css-loader', 'sass-loader']
      }
    ]
  },
  plugins: [
    new MiniCssExtractPlugin({
      filename: './css/[name].css',
    }),
  ],
};