text: const crypto = require('crypto')
  const app = require('express')()
  const port = 3002
  
  app.get('/json', (req, res) => {
      res.json({ hello: 'world' })
  })
  
  app.get('/hash/sha256', (req, res) => {
      res.json({ hash: crypto.createHash('sha256').update(req.query.text).digest('hex') })
  })
  
  app.listen(port, () => {
      console.log(`Express app listening on port ${port}!`)
  })
  