text: const express = require('express')
  const app = express()
  const { createReadStream } = require('fs')
  const port = 4000
  
  app.use(function(req, res, next) {
        res.header("Access-Control-Allow-Origin", "*")
      res.setHeader("Content-Security-Policy", "default-src 'self'"); 
      next()
  })
  
  app.get('/', (req, res) => {
    res.sendFile('iframe.html', {root: __dirname })
  })
  
  app.listen(port, () => {
    console.log(`Server 1 (NO iframe) listening at http://localhost:${port}`)
  })