nodemon

Nodemon 是一款颇受欢迎的开发服务器，能够检测工作区代码的变化，并自动重启。通过以下命令安装 nodemon：

npm install nodemon --save-dev

{
  "name": "express_resume",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "nodemon server.js",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.17.1"
  },
  "devDependencies": {
    "nodemon": "^2.0.2"
  }
}

const express = require('express');

const hostname = 'localhost';
const port = 3000;

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

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