Load static app with react, react-router-4, express

app-static.js

const express = require('express')
const path = require('path')
const app = express()

const port = process.env.PORT || 8000
app.use(express.static(path.join(__dirname, '/public')))

app.get('*', function (req, res) {
  res.sendFile(path.resolve(__dirname, 'public', 'index.html'))
})

app.listen(port, () => {
  console.log('http://localhost:', port)
})