Unauthenticated Access to Docker Repositories

[fink-andreas]

Sometimes it is required to provide access to docker repositories without any authentication. It would be great to have this feature in artipie.

The feature is, for example, available in Nexus:
https://help.sonatype.com/repomanager3/nexus-repository-administration/formats/docker-registry/docker-authentication

• Add the anonymous user as a user who doesn't have credentials.
• Implement Token Authentication for the docker adapter. Add a token for an anonymous user. If the user auth request doesn't contain credentials, it'll get the anonymous token and all operations will be authorized on behalf of the anonymous user.

[dgarus]

Docker client does not handle 401 Unauthorized response codes from registry correctly #18569
So, there is no a simple way to use authenticated and unauthenticated users to access the same repository.

[github-actions]

Issue is stale, CC: @artipie/maintainers