Julien

@stefanprodan I would propose to handle local storage as another type of "backup". Since several destinations can be specified for bucket storage, maybe this could be also specified like this....

Do we agree that the relevant option are these policies: https://github.com/docker/distribution/blob/607ae5d128a82f280e8c7f453d5fb30c535bda17/configuration/configuration.go#L221 ?