Add label org.opencontainers.image.source="https://github.com/python/cpython" to DOCKERFILE

[marwin1991]

ello, for tools like renovate it is important to have define label org.opencontainers.image.source

So can we add label org.opencontainers.image.source="https://github.com/python/cpython" to DOCKERFILE ?

Base on this label, renovate will provide information about changes.

https://docs.renovatebot.com/modules/datasource/docker/
https://github.com/opencontainers/image-spec/blob/main/annotations.md

[tianon]

See docker-library/cassandra#260

[tianon]

This is now fixed: https://oci.dag.dev/?image=python@sha256:416855cb95a0dd2b7149c91f4af88549def1af9c6c4fa9ab78404578bc97271d&mt=application%2Fvnd.oci.image.manifest.v1%2Bjson&size=2324