①全局安装

npm install -g @vue/cli

②创建一个项目

vue create hello-world

③错误采用vue serve命令，结果出现下面这个

  Command vue serve requires a global addon to be installed.
  Please run npm i -g @vue/cli-service-global and try again.

④继续执行了

npm i -g @vue/cli-service-global

⑤重新npm run serve，输出末尾是

  App running at:
  - Local:   http://localhost:8080/
  - Network: http://192.168.0.101:8080/

  Note that the development build is not optimized.
  To create a production build, run npm run build.

⑥访问http://192.168.0.101:8080/，显示如下

⑦按代码执行顺序分析脚手架结构（https://www.bilibili.com/video/BV1Zy4y1K7SH?p=62）

即执行了npm run serve之后从哪个文件开始运行的。