Consider to use label/annotation specs from OCI

[tmaier]

Hi,

I don't know what your relations to the OCI are, but when I just saw #labels the first time, I immediately thought it would make sense to align your best-practices with https://github.com/opencontainers/image-spec/blob/master/annotations.md

Another labelling approach (https://github.com/label-schema) already deprecated their standard in favour of OCI. At https://github.com/opencontainers/image-spec/blob/master/annotations.md#back-compatibility-with-label-schema you can even see how pragmatic they noted down the migration path from label-schema to OCI.

Cheers

Tobias