Object that describe desired container

[jeffque]

Describe a container and how to run it. Name and image tag are mandatory (initialize, must be non-nil)

Some stuff:

• CLI args
• env var
  • just the env var definition
  • env var + value
• envfile
• volume
  • if only a string is passed without any :, then bounds to the same value
    container.volumes << '/var/run/docker.sock' will create `-v '/var/run/docker.sock:/var/run/docker.sock'
  • if a string with one unprotected :, then bounds accordingly
    container.volumes << '/smthg/another:/app' will create `-v '/smthg/another:/app'
  • may pass a Volume object container.volumes << Volume.new('/smthg/another', '/app') will create `-v '/smthg/another:/app'
  • other forms must coalesce to Volume form
• restart options
• another option that may not be here