Add copy in/out support

[avnik]

Would be nice to implement archive endpoint.

https://docs.docker.com/engine/reference/api/docker_remote_api_v1.24/#/get-an-archive-of-a-filesystem-resource-in-a-container https://docs.docker.com/engine/reference/api/docker_remote_api_v1.24/#/extract-an-archive-of-files-or-folders-to-a-directory-in-a-container

PS I'd like to try implement it myself, but possible need little guiding/hinting