Add labels to BioContainers made from Bioconda packages

[RenskeW]

Hello,

@mr-c and I are working on including software metadata in Workflow Run RO-Crate provenance. While registries such as bio.tools provide metadata, they are often not specific for a version. Therefore, it would be very useful if metadata could be directly retrieved from the container itself, using labels (following a common scheme).

Current status

BioContainers built from Dockerfiles have non-standard labels:

• base_image
• version (Dockerfile version)
• software
• software.version
• about.summary
• about.home
• about.documentation
• about.license_file
• about.license
• extra.identifiers.biotools
• about.tags

BioContainers made from Bioconda packages are unlabeled.

Proposal

• Add labels to BioContainers made from Bioconda packages.
• Annotations should follow the Open Container Initiative (OCI) format.
• Bio.tools identifiers could be represented by the namespaced key org.identifiers.biotools. This key can be adapted to represent other software identifiers (e.g. org.identifiers.rrid).