Maintainer instruction is deprecated #214
Description
I was looking over the builds for another reason but noticed docker emitting the following warning:
MAINTAINER instruction is deprecated in favor of using label
Looking it up I see:
https://docs.docker.com/reference/build-checks/maintainer-deprecated/
which refers to https://github.com/opencontainers/image-spec/blob/main/annotations.md#pre-defined-annotation-keys
We may want to go over some of our {Docker,Container}files and update them to better fit the OCI standard(s).