webpack.config.js

const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const CssMinimizerPlugin = require('css-minimizer-webpack-plugin');

module.exports = {
  output: {
    path: __dirname + '/Public/assets',
  },

  plugins: [
    new MiniCssExtractPlugin({
      // Options similar to the same options in webpackOptions.output
      // both options are optional
      filename: '[name].css',
      chunkFilename: '[id].css',
    }),
  ],

  module: {
    rules: [
      {
        test: /\.(le|sa|sc|c)ss$/,
        use: [
          {
            loader: MiniCssExtractPlugin.loader,
            options: {
              publicPath: '../Public/assets/',
            },
          },
          {
            loader: 'css-loader',
            options: {
              url: false,
            },
          },
          {
            loader: "less-loader",
            options: {
              lessOptions: {
                strictMath: true,
              },
            },
          },
        ],
      },
    ],
  },

  optimization: {
    minimizer: [
      // For webpack@5 you can use the `...` syntax to extend existing minimizers (i.e. `terser-webpack-plugin`), uncomment the next line
     `...`,
      new CssMinimizerPlugin(),
    ],
  },

};