Triggers on push to 4.x (the production line shipped to the
Charlie/monica stack). Upstream main tracks monica v5 which isn't
deployed.
Uses scripts/docker/Dockerfile (the apache variant from monicahq/docker).
Pushes 'latest' and an immutable UTC timestamp tag to
gitea.alexandru.macocian.me/amacocian/monica.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>