Since docker hub stopped Autobuild, we need to switch to something else.
This will trigger building of images on Github Actions and pushes them
to Docker Hub.
You only need to add 3 secrets before you merge this PR to have it working directly.
- DOCKERHUB_USERNAME : The username of the account you are going to push the builds to
- DOCKERHUB_TOKEN : The token needed to login and push builds
- DOCKERHUB_REPO : The repo name in the following form `index.docker.io/<user>/<repo>`
So for vaultwarden that would be `index.docker.io/vaultwarden/server`
Also some small modifications to the other workflows.
The bitwarden_rs code is still cross-compiled exactly as before, but Docker
Buildx is used to rewrite the resulting Docker images with correct platform
metadata (reflecting the target platform instead of the build platform).
Buildx also now handles building and pushing the multi-arch manifest lists.
With some apt/dpkg magic building multidb containers for arm versions
now also works. As long as the build stage and docker-image stage use
the same base (debian buster now) it should all work.
Resolves #530, resolves #1066
