Central runner on ana-docker (gitea is local; existing fleet tooling
already SSHes from there). Playbook is parameterized so future
site-local runners (nh3-docker, esh-docker-vm) drop in via --var
overrides instead of copy-paste.
Includes a workflow template for vh/task-board that calls the existing
deploy-task-board.yaml playbook — keeps the playbook as the single
source of truth for "how task-board is deployed", manual or automated.
Labels embed `:docker://node:20-bookworm-slim` schema; without it,
act_runner v0.6+ silently falls back to host-mode and runs job steps
inside the Alpine runner container (no apt/python/node), breaking any
real workflow. node:20-bookworm-slim is small + has git + node so
actions/checkout works out of the box.
