webpack.config.js

const path = require('path');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
require('dotenv').config();
const { DefinePlugin } = require('webpack');

module.exports = {
  mode: 'development',
  entry: './src/client/index.js',
  output: {
    path: path.resolve(__dirname, 'public'),
    filename: 'bundle.js',
  },
  module: {
    rules: [
      {
        test: /\.(sa|sc|c)ss$/,
        use: [
          MiniCssExtractPlugin.loader,
          {
            loader: 'css-loader',
            options: {
              sourceMap: true,
            },
          },
          'sass-loader',
        ],
      },
      {
        test: /\.m?js$/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/env', '@babel/react'],
          },
        },
      },
      {
        test: /\.(png|svg|jpg|gif)$/,
        use: ['file-loader'],
      },
    ],
  },
  plugins: [
    new CleanWebpackPlugin({
      cleanAfterEveryBuildPatterns: ['!index.html'],
    }),
    new MiniCssExtractPlugin(),
    new HtmlWebpackPlugin({
      title: 'Hake Shonassy Bot',
      inject: 'head',
      scriptLoading: 'defer',
    }),
    new DefinePlugin({
      'process.env.BOT_NAME': JSON.stringify(process.env.BOT_NAME),
      'process.env.SUBDOMAIN': JSON.stringify(process.env.SUBDOMAIN),
    }),
  ],
  resolve: {
    modules: ['node_modules', 'src/client'],
  },
};