Setup Express project

Setup TypeScript

Setup TypeScript in Node.js project

Install package

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

Setup basic server at src/main.ts

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!')
})

Start server

npm run dev