add online example

[i5ting]

朋友反馈

现在最大的问题还是本地跑example不友好。 或者可以部署一个在线的应用给大家访问

解法是：umi build将example打包，然后使用 https://github.com/tschaub/gh-pages 发布example/dist到git pages就好了

[i5ting]

https://github.com/imgcook/imove/tree/online-example ， 目前能够生产，但路径和mock/db.json还有问题，需要调试

[i5ting]

目标路径 https://imgcook.github.io/imove/

[T1Kingu]

ok

[i5ting]

use codesandbox preview: https://utu9d.sse.codesandbox.io

[i5ting]

fork https://codesandbox.io/s/github/imgcook/imove/tree/online-example

[i5ting]

add sandbox.config.json

{
    "template": "node",
    "container": {
      "port": 8000
    }
  }

[i5ting]

https://img.shields.io/static/v1?label=Online&message=Example&color=blueviolet

[i5ting]

• fork https://codesandbox.io/s/github/imgcook/imove/tree/master
• master demo https://65hzt.sse.codesandbox.io/