Feature: Allow setting environment variables with DockerCompose

What are you trying to do?
I would like to be able to build and run docker compose containers using environment variables not stored in an env file. We are trying to test spinning up n database containers where n is configurable. Each database has its own name and root credentials which are generated dynamically so we cannot hard code them in env files.

Why should it be done this way?

This enhancement would allow users to define the environment variables for a docker compose service at runtime. Gives the library more flexibility.

Other references:

Docker Compose Environment Variable Options.

从 DockerCompose 入口点开始，阅读 issue 中链接的 Docker Environment Variable Options 参考文档，然后跟踪 compose 服务和环境文件的配置方式。当调用方能够为 compose 服务提供运行时生成的变量（包括动态数据库名称和凭据），而无需 env 文件时，即视为完成。