Renamed pipeline from "Build and Push to Registry" to "Build Image".
Dropped the registry login/push/logout steps (needed secrets that
don't exist on the new instance) and the hardcoded git clone against
gitea.servernah.com in favor of actions/checkout, which works
regardless of which Gitea instance runs it.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>