server.js

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

const app = new (require('express'))()
const port = 3000

const compiler = webpack(config)
app.use(webpackDevMiddleware(compiler, { noInfo: true, publicPath: config.output.publicPath }))
app.use(webpackHotMiddleware(compiler))

app.get('/', function (req, res) {
  res.sendFile(path.join(__dirname, '/index.html'))
})

app.listen(port, function (error) {
  if (error) {
    console.error(error)
  } else {
    console.info('==> 🌎  Listening on port %s. Open up http://localhost:%s/ in your browser.', port, port)
  }
})