服务编排的depends

设置服务的依赖关系。
设置之后，容器服务可以控制容器的启动顺序，一个接一个的启动容器。
[backcolor=transparent]示例:
[backcolor=transparent]注意： 多个依赖使用逗号（,）分隔。

1. [backcolor=transparent]web[backcolor=transparent]:
2. [backcolor=transparent]  image[backcolor=transparent]:[backcolor=transparent] wordpress[backcolor=transparent]:[backcolor=transparent]4.2
3. [backcolor=transparent]  ports[backcolor=transparent]:
4. [backcolor=transparent]    [backcolor=transparent]-[backcolor=transparent] [backcolor=transparent]80
5. [backcolor=transparent]  links[backcolor=transparent]:
6. [backcolor=transparent]    [backcolor=transparent]-[backcolor=transparent] db[backcolor=transparent]:[backcolor=transparent]mysql
7. [backcolor=transparent]  labels[backcolor=transparent]:
8. [backcolor=transparent]    aliyun[backcolor=transparent].[backcolor=transparent]depends[backcolor=transparent]:[backcolor=transparent] db[backcolor=transparent],[backcolor=transparent]redis
9. [backcolor=transparent]db[backcolor=transparent]:
10. [backcolor=transparent]  image[backcolor=transparent]:[backcolor=transparent] mysql
11. [backcolor=transparent]  environment[backcolor=transparent]:
12. [backcolor=transparent]    [backcolor=transparent]-[backcolor=transparent] MYSQL_ROOT_PASSWORD[backcolor=transparent]=[backcolor=transparent]password
13. [backcolor=transparent]redis[backcolor=transparent]:
14. [backcolor=transparent]  image[backcolor=transparent]:[backcolor=transparent] redis