Update README docs, add the contributing section (#280)

README-CN.md

@@ -661,4 +661,16 @@ $ gofs -about
 ### Web UI
 
 [gofs-webui](https://github.com/no-src/gofs-webui)是`gofs`的Web用户界面工具，它允许你通过Web用户界面来生成`gofs`
-的配置文件，让使用`gofs`变得更加简单
+的配置文件，让使用`gofs`变得更加简单
+
+## 贡献
+
+利用云开发环境快速参与贡献
+
+### Github Codespaces
+
+[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/no-src/gofs)
+
+### Gitpod
+
+[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/no-src/gofs)

README.md

@@ -691,4 +691,16 @@ $ gofs -about
 ### Web UI
 
 The [gofs-webui](https://github.com/no-src/gofs-webui) is a web UI tool for `gofs`, and it allows you to generate the
-config file of `gofs` through the web UI, making the use of gofs easier.
+config file of `gofs` through the web UI, making the use of gofs easier.
+
+## Contributing
+
+Quick to contribute using cloud development environments.
+
+### Github Codespaces
+
+[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/no-src/gofs)
+
+### Gitpod
+
+[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/no-src/gofs)