Add option to set container name

[dododedodonl]

When converting from a compose file, container_name might not be set. The flag added gives the option to set the service's key as container name when it is not set already.

[k9withabone]

@TheRealBecks what do you think of this new option?

[TheRealBecks]

I may have overlooked it, but how do I set --add-container-name when there are several services defined? When there's no container_name Podman generates names for services as <project-name>-<service-name>-<number-starting-at-1>.

Also container_name does not allow scaling as there can't be two containers with the same name for one service, see compose-spec#container_name

So keep in mind that this command collides with:

• scale
• replicas

@k9withabone Is there a way to make scale and container_name mutually exclusive per service? replicas is not yet implemented.