Simple NodeJS Express server with CORS and pre-flyght

server.js

const express = require('express')
const cors = require('cors')
const bodyParser = require("body-parser")
const app = express()

const PORT = process.env.port || 4000

// to parse req.body for POST-requests
app.use(bodyParser.urlencoded({extended: true}));
app.use(bodyParser.json());

app.options('/i-eat-params/', cors())

app.del('/i-eat-params/', cors(), function (req, res, next) {
  res.json({msg: 'This is CORS-enabled for all origins!'})
})

app.post('/i-eat-params/', cors(), function (req, res, next) {
  const parsedParams = JSON.stringify(req.body, null, 2)
  console.log("parsedParams: ", parsedParams)
  res.json({status: 'success'})
})

app.listen(PORT, function () {
  console.log(`CORS-enabled web server listening on port ${PORT}`)
})

How to run server: node server.js --port 4000
Simple check:

curl 'http://localhost:4000/i-eat-params/'  --data-binary '{"param1":143,"param2":{"width":300,"height":150},"param3":{}}'