Node Express API deployed to Vercel

.gitignore

node_modules

index.js

// index.js
const express = require('express')

const app = express()
const PORT = 4000

app.listen(PORT, () => {
  console.log(`API listening on PORT ${PORT} `)
})

app.get('/', (req, res) => {
  res.send('Hey this is my API running 🥳')
})

app.get('/about', (req, res) => {
  res.send('This is my about route..... ')
})

// Export the Express API
module.exports = app

vercel.json

{
  "version": 2,
  "builds": [
    {
      "src": "index.js",
      "use": "@now/node"
    }
  ],
  "routes": [
    {
      "src": "/(.*)",
      "dest": "index.js"
    }
  ]
}