server.js

const express = require('express');
const webpack = require('webpack');
const webpackDevMiddleware = require('webpack-dev-middleware');
const webpackHotMiddleware = require('webpack-hot-middleware');
const WebpackConfig = require('./webpack.config');

const app = express();
const compiler = webpack(WebpackConfig);

app.use(
  webpackDevMiddleware(compiler, {
    publicPath: '/__build__/',
    stats: {
      colors: true,
      chunks: false,
    },
  }),
);

app.use(webpackHotMiddleware(compiler));

const port = process.env.PORT || 8080;
module.exports = app.listen(port, () => {
  console.log(`Server listening on http://localhost:${port}, Ctrl+C to stop`);
});