bookstack | image: mariadb:12.3
calcom | image: postgres:16-alpine
claper | image: postgres:16-alpine
docmost | image: postgres:16-alpine
kimai | image: mariadb:11.6
outline | image: postgres:16-alpine
rallly | image: postgres:16-alpine
sparkyfitness | image: postgres:15-alpine
tandoor | image: postgres:16-alpine
zipline | image: postgres:16-alpine

Method: for each templates/<app>/, an app qualifies when BOTH
  (a) .felhom.yml declares  needs_hdd: false
  (b) docker-compose.yml has an image: line matching postgres|mariadb|mysql
Catalog @ 459766cb1639.
COUNT MEASURED THIS SESSION: 10  -- agrees with the runbook's table.
