webpack.config.js

const path = require('path');

module.exports = {
  entry: path.resolve(__dirname, './client/src'),
  output: {
    path: path.resolve(__dirname, './public'),
    filename: 'bundle.js',
  },
  module: {
    rules: [
      {
        test: /\.(js|jsx)$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader',
          options: {
            presets: ['@babel/preset-env', '@babel/preset-react'],
            plugins: ['@babel/transform-runtime'],
          },
        },
      },
      {
        test: /\.(png|jpg|svg)$/,
        use: {
          loader: 'file-loader',
        },
      },
      {
        test: /\.css$/,
        use: ['style-loader', 'css-loader','postcss-loader']
      },
      {
        test: /\.(scss)$/,
        use: [{
          loader: 'style-loader',
        }, {
          loader: 'css-loader',
        }, {
          loader: 'sass-loader'
        }]
      },
    ],

  },
  resolve: {
    fallback: {
      util: require.resolve('util/')
    },
    extensions: ['.jsx', '.js', '.mjs'],
  },
  devtool: 'inline-source-map',
  mode: 'development',
};