express + webpack启动服务

const express = require('express')
const webpack = require('webpack')
const getPort = require('./utils/port')
const log = require('../utils/log')
const getHostIp = require('../utils/ip')
const webpackDevMiddleware = require('webpack-dev-middleware')
const webpackHotMiddleware = require('webpack-hot-middleware')
const app = express()

export default function server({
  initPort = 9000,
  devConfig
}) {
  const compiler = webpack(devConfig)
  app.use(webpackDevMiddleware(compiler, {
    publicPath: devConfig.output.publicPath || './dist'
  }))

  app.use(webpackHotMiddleware(compiler));

  getPort(initPort).then(port => {
    app.listen(port, function (err) {
      if (err) log.fail('dev server start failed', err)
      log.success(`
       App running at:
      ===========================
      - Local: http://localhost:${port}
      - Host: http://${getHostIp()}:${port}
      ===========================`)
    })
  })
}