webpack.config.js

const path = require('path');
const CopyWebpackPlugin = require('copy-webpack-plugin');
const BrowserSyncPlugin = require('browser-sync-webpack-plugin');

const outputDirectory = 'dist';

module.exports = {
  mode: 'development',
  entry: './client/client.js',
  watch: true,
  output: {
    path: path.join(__dirname, 'client', outputDirectory),
    filename: 'bundle.js'
  },
  watchOptions: {
    ignored: ['server/**/*.js', 'node_modules']
  },
  module: {
    rules: [
      {
        test: /\.js$/,
        exclude: /node_modules/,
        use: {
          loader: 'babel-loader'
        }
      },
      {
        test: /\.scss$/,
        use: ['style-loader', 'css-loader', 'sass-loader']
      },
      {
        test: /\.(png|jpg|gif|svg)$/,
        use: [
          {
            loader: 'file-loader',
            options: {}
          }
        ]
      }
    ]
  },
  plugins: [
    new CopyWebpackPlugin([{ from: 'assets/**/*', context: 'client' }, { from: 'index.html', context: 'client' }]),
    new BrowserSyncPlugin({
      server: { baseDir: ['client/dist', 'server'] },
      watch: true
    })
  ]
};