server.js

const next = require('next')
const express = require('express')

const dev = process.env.NODE_ENV !== 'production'
const app = next({ dev })
const handle = app.getRequestHandler()

app.prepare().then(() => {
  const server = express()

  server.all('*', (req, res) => handle(req, res))

  const port = process.env.PORT || 3000
  server.listen(port, (err) => {
    if (err) throw err
    console.log('> Ready on http://localhost:' + port)

    // if (dev) {
    //   fetch(`http://localhost:${port}/api/regenerate-all`, {
    //     method: 'POST',
    //     headers: {
    //       'Content-Type': 'application/json'
    //     },
    //     body: JSON.stringify({
    //       token: process.env.SLACK_VERIFICATION_TOKEN
    //     })
    //   })
    // }
    // trigger own startup message in production
    if (!dev) {
      fetch(`http://localhost:${port}/api/startup`, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json'
        },
        body: JSON.stringify({
          token: process.env.SLACK_VERIFICATION_TOKEN
        })
      })
    }
  })
})