运行
node server.js
打开浏览器输入http://localhost:8080
https://github.com/SangKa/PWA-Book-CN
https://developers.google.com/web/progressive-web-apps/checklist
https://codelabs.developers.google.com/codelabs/your-first-pwapp/#0
https://lzw.me/a/pwa-service-worker.html
(移动端兼容性)[https://lavas.baidu.com/ready]