server.js

var express = require('express')
var webpack = require('webpack')
var merge = require('lodash/merge')
var config = merge({}, require('./webpack.docs.config'))

config.devtool = 'cheap-module-eval-source-map'
config.entry.unshift('webpack-hot-middleware/client')
config.plugins.push(
  new webpack.HotModuleReplacementPlugin(),
  new webpack.NoErrorsPlugin()
)

var app = express()
var compiler = webpack(config)

app.use(require('webpack-dev-middleware')(compiler, {
  noInfo: true,
  publicPath: config.output.publicPath
}))

app.use(require('webpack-hot-middleware')(compiler))

app.use(express.static('docs-site'))

app.listen(8080, 'localhost', function (err) {
  if (err) {
    console.log(err)
    return
  }

  console.log('Listening at http://localhost:8080')
})