Adjust Github Action: Docker Publish

Adjust Github Action: Docker Publish

1. Not only publish Docker images when new release tags are created but
   on every push to master, since release frequency is so low.

2. Use newer versions of the various actions (setup-buildx-action,
   login-action, metadata-action, ...) to suppress some deprecation
   warnings see:
   https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/