Use docker API instead of exec docker commands

[wpjunior]

Call commands are less safe than call the docker API. In long time docker-cli may change contract and should broken the app, the API of docker is versioned and avoid break changes.

References:

https://docs.docker.com/engine/reference/api/docker_remote_api/ https://github.com/softprops/tugboat

[domdom82]

is this meant in the sense of the invoker using API calls instead of CLI?

[markusthoemmes]

Looking at recent optimizations in the Invoker (introducing Futures and more typing) this could make a lot of sense to encapsulate the docker commands naturally, without the need to think about managing resources for the blocking docker calls.