NPM https://www.npmjs.com/package/koa-generator
Github https://github.com/i5ting/koa-generator
Express初始化 https://www.expressjs.com.cn/starter/generator.html
npm install -g koa-generator
npx express-generator
# 老的 Node版本,通过 npm 将 Express 应用程序生成器安装到全局环境中并执行
npm install -g express-generator
express