Automatically add standard annotations to images

[nwiltsie]

https://github.com/docker/metadata-action?tab=readme-ov-file#overwrite-labels-and-annotations

Having, at minimum, the following labels added to all images should be super helpful. I don't know if there's a way to specify these without overwriting a label written into the Dockerfile.

From this link:

Label	Meaning
org.opencontainers.image.created	date and time on which the image was built, conforming to RFC 3339
org.opencontainers.image.source	URL to get source code for building the image (string)
org.opencontainers.image.revision	Source control revision identifier for the packaged software