Adds file-level restic for the NH3 Docker VM. Targets the Synology
rest-server (rest-server-nh3 at 10.100.50.50:8000) as user nh3-docker —
site-local writes matching the fleet pattern.
No pre-backup hook needed: none of the stacks on this host (adguard,
dockge, beszel-agent, dozzle-agent, portainer) run relational DBs. The
SQLite state in their named volumes is WAL-mode and restores cleanly
from raw restic capture.
Source paths mirror ana-ml2's template (/opt/docker, /etc, /root,
/var/lib/docker/volumes) with the same exclude list (docker internals,
logs, pids, root's shell/caches). ~1.6 MB of compose files + small
volumes — expected snapshot size a few hundred MB at most, dominated
by any AdGuard query log history.
README walks through reuse (existing repo + htpasswd) vs fresh init
paths, resticprofile install, timer generation, and verification via
the Backrest UI.
