Support for Docker Engine APIs for gitlab container registry

Problem to solve

Add a complete API support for container registry so everything the Docker client can do can be done with the API.

Further details

It would be nice to have full docker API support for container registry so that it can be interacted with any standalone REST based docker client.

Proposal

Not sure how current container registry is implemented but if is based on open source docker project, then we can add the API support available.

Who can address the issue

Other links/references

Refer the current docker engine APIs: https://docs.docker.com/engine/api/v1.40/#