Self-contained Dockerfile under linux/debian/ that bakes runner user,
Docker CE, Node.js v20+v24, latest Go, yq, and act env vars. Uses
Debian's git-lfs and Docker CE from download.docker.com. Published to
git.ipng.ch/ipng/gitea-debian-runner:13-slim. README documents build
and push commands (single-arch and multi-arch via buildx).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>