Clarify documentation for multiple registries

[bschonec]

Is this a docs issue?

• My issue is about the documentation content or website

Type of issue

Other

Description

When pushing to multiple registries, the documentation doesn't make it clear that the name of each registry needs to be prepended in each of the 'tags:' arguments. While the documentation does show a valid use of the tags: argument, it's not completely clear that docker.io is the default when the registry isn't specified. 'ghcr.io' is prepended to two of the tags but somewhere in there it should state that each registry must be specified and if it isn't, that docker.io is the default.

Location

https://github.com/docker/docs/blob/main/content/manuals/build/ci/github-actions/push-multi-registries.md

Suggestion

No response