### What problem were solved in this pull request?

ref #205

Problem:
docker image has some security issues

### What is changed and how it works?
move step chpassword to startup

### What problem were solved in this pull request?

Issue Number: ref #205 

Problem:
The build method is different with the current docker image, so we need
to update it.

### What is changed and how it works?
Install build tools and dependencies when building image.

优化Docker开发环境：
- docker镜像使用zsh；
- 自动初始化vscode开发调试配置环境；
- 容器中开启ssh服务，方便远程开发；
- 可以在构建镜像时clone自己的代码；
- 提供了丰富详细的使用文档。