webhook.js

const express = require('express')
const app = express()
const port = 3000
const fs = require('fs')

app.use(express.json())
app.use(express.urlencoded({ extended: true }))

let counter = 0

app.post('/', (req, res) => {
  fs.writeFile(`response${counter}.json`, JSON.stringify(req.body), (err) => {
    if (err) {
      console.log("something happened saving the file")
    }
    counter++
    console.log("body response was saved!")
  })
  res.status(200)
})

app.listen(port, () => console.log(`Running`))