Host-mode jobs run directly in the runner container instead of a
spawned per-job container, so JS actions like actions/checkout@v4
have no Node.js runtime to execute with. Replace it with a plain git
fetch/checkout in the deploy job.
Containerize the app (Dockerfile, docker-compose.yaml) and add a CI
deploy job that syncs the checkout to /srv/docker/maptool and runs
docker compose directly, using the runner's new "host" execution
label to reach the host's Docker daemon and filesystem.
randy