Prevent Apify from shutting down my express server

Question

I have an express server with a POST endpoint that starts a crawler. When the crawler finishes it shuts down the whole server. Am I doing something wrong? How can I prevent it from happening?

The project looks something like this:

// server.js
const express = require('express')
const bodyParser = require('body-parser')
const startSearch = require('./crawler.js')

const app = express()

app.use(bodyParser.json())

app.post('/crawl', async (req, res) => {
  const { foo, bar } = req.body

  startSearch({ foo, bar })
  res.end()
})

app.listen(PORT, () => console.log(`listening on port ${PORT}`))

// crawler.js
const Apify = require('apify')

const startSearch = ({ foo, bar }) => {
  Apify.main(async () => {
    const sources = [{
      url: 'https://path_to_website.com',
      userData: { foo, bar }
    }]
    const requestList = await Apify.openRequestList(null, sources)

    const crawler = new Apify.PuppeteerCrawler({
      requestList,
      handlePageFunction: async ({ request, page }) => {
          // do things using puppeteer
        }
      }
    })

    await crawler.run()
  })
}

Answer 1

Just avoid using Apify.main(). For details, see How to use Apify on Google Cloud Functions

(I thought I'm sending the answer, but it seems it was just a comment)