mkdir node-express-typescript
cd node-express-typescript
npm init --yes

{
  "name": "Your File Name",
  "version": "1.0.0",
  "description": "",
  "main": "index.ts", // 將入口點從js更改為.ts
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "type": "module",
  "keywords": [],
  "author": "",
  "license": "ISC"
}

npm install express mongoose cors mongodb dotenv

npm install  -D typescript ts-node-dev @types/express @types/cors

npx tsc --init

target: es2016
module: commonjs
strict: true
esModuleInterop: true
skipLibCheck: true
forceConsistentCasingInFileNames: true

{
  "compilerOptions": {
    "outDir": "./dist"

    // other options remain same
  }
}

import express, { Express, Request, Response , Application } from 'express';
import dotenv from 'dotenv';

//For env File 
dotenv.config();

const app: Application = express();
const port = process.env.PORT || 8000;

app.get('/', (req: Request, res: Response) => {
  res.send('Welcome to Express & TypeScript Server');
});

app.listen(port, () => {
  console.log(`Server is Fire at http://localhost:${port}`);
});

npm install  nodemon

{

  "scripts": {
    "build": "npx tsc",
    "start": "node dist/index.js",
    "dev": "nodemon index.ts"
  }
}

npm run dev