Setup Express project

npm i express && npm i -D @types/express

import express from 'express'

const app = express()

const PORT = process.env.PORT || 3000

app.listen(PORT, () => {
  console.log(`Listening at http://localhost:${PORT}`)
})

app.get('/', (req, res) => {
  res.send('Hello World!')
})

npm run dev