I am so not understanding the purpose of this...

If you need Docker CLI commands, isn't it just easier to use the CLI that you're already on?

Docker is fully self-documented:

    / # docker
  Usage:  docker [OPTIONS] COMMAND
  
  A self-sufficient runtime for containers
  
  Common Commands:
    run         Create and run a new container from an image
    exec        Execute a command in a running container
  
  …SNIP…
  
  / # docker run --help
  Usage:  docker run [OPTIONS] IMAGE [COMMAND] [ARG...]
  
  Create and run a new container from an image
  
  Aliases:
    docker container run, docker run
  
  Options:
        --add-host list                    Add a custom host-to-IP mapping (host:IP)

  …SNIP…