Improve DockerCompose documentation

Hi. I'm starting to use testcontainers to test the behavior of a simple P2P network written in Python. I noticed that the auto-generated documentation for each class is just a copy of the constructor (without parameters descriptions) and a small code example. It would be really helpful if, at least, a small description of the behavior of each available method for each class was provided. Then this could be improved by adding a small description of the meaning of each parameter.

Small addition: for some reason, the documentation has really big margins on the left and the right but the title is too long.

从 issue 中链接的生成文档开始，找到 DockerCompose 类及其方法页面。在记录方法行为和参数含义之前，先检查文档的生成和样式设置方式；当页面解释了可用的方法和参数，并且过大的边距和过长的标题得到修正时，即视为完成。