sos-nextjs/index.js

require('dotenv').config()
const express = require('express')
const nextjs = require('next')
const {promisify} = require('util')

const dev = process.env.NODE_ENV !== 'production'
const next = nextjs({dev})
const nextRequestHandler = next.getRequestHandler()
const app = express()
app.listen = promisify(app.listen.bind(app))

;(async ()=>{

  // Allow Next.js to compile its templates
  console.log('Preparing Next.js templates . . .')
  await next.prepare()

  const app = express()

  app.use('/api', require('./api'))
  app.use(nextRequestHandler)

  await app.listen(3000)

  console.log('App listening on port 3000')

})().catch((ex) => {
  console.error(ex.stack)
  process.exit(1)
})