old_contents: const express = require('express')
  const router = express.Router()
  
  router.get('/', (req, res) => {
    res.render('layout')
  })
  
  module.exports = router
  
new_contents: const express = require('express')
  const router = express.Router()
  
  router.get('/', (req, res) => {
    res.render('layout', {title: 'PolyannoEd'})
  })
  
  module.exports = router
  
subject: add testing title