- Replace host systemd runner with myoung34/github-runner container
in the main compose stack
- Mounts docker.sock (GID 1001), /valhalla-lab, and /config/caddy
so the workflow can deploy compose and reload Caddy without SSH
- Update deploy.yml to write files via mounted paths and use a shared
COMPOSE env var for cleaner step commands
- Add GITHUB_RUNNER_ACCESS_TOKEN placeholder to .env (fine-grained PAT
with Administration:write needed for runner self-registration)