Container Support

There will be 2 repo types: ContainerRepo and ContainerPushRepo. The gist is - repo created for docker push cannot be used for mirroring content and viceversa. Content curation will still be possible on both repo types

Push repo:

• Cannot be created/updated via Pulp API (https://pulp.plan.io/issues/7013)
• Will be created on demand by Registry API
• Can be used for push content from docker/podman client or via Docker Registry API
• Cannot be used for syncing content
• Artifacts cannot be removed via Pulp API, docker API can be used to manipulate content of a push repo
• Artifacts can be copied from a push repo to a container repo via Pulp API
• Artifacts cannot be copied into a push repo
• No rollback available, latest version is always served

Container Repo:

• Cannot be used for push content from docker/podman client or via Docker Registry API
• Can be used for syncing content
• Artifacts can be removed via Pulp API only
• Artifacts can be copied from a push repo to a container repo via Pulp API
• Artifacts can be copied from a container repo to a container repo via Pulp API
• Rollback availalbe, latest or specific repo version can be served