Bring the checklist app under version control

The project has lived only as a folder on the Mac Studio and, briefly, as a
transfer tarball. This is the first commit: the Express server and its web
front end, the Capacitor iOS and Android wrappers, and the release and backup
scripts.

The repo is the source, not a backup of the machine. Left out on purpose, by
the .gitignore files that were already in the tree: node_modules, build output,
mobile/www (regenerated from server/public on every build), and server/data,
which holds the live checklists and belongs on the NAS rather than in git.

Every credential is excluded too — server/.env, the Play upload keystore and
its properties file, the App Store Connect key and ios-signing.config. The one
secret that was not in an ignored file was the NAS SSH password, hard-coded in
build-deploy.sh and grepped back out of it by backup-to-drive.sh. Both now read
it from the login keychain (service checklist-nas, account Christian), falling
back to NAS_PASS in the environment, so rotating it is one keychain entry
rather than a history rewrite.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

server/docker-compose.yml

@@ -0,0 +1,15 @@
+services:
+  checklist:
+    build: .
+    image: recurring-checklist:latest
+    container_name: recurring-checklist
+    restart: unless-stopped
+    ports:
+      # Host port : container port. Change the left side if 3000 is taken.
+      - "3000:3000"
+    env_file:
+      - .env
+    volumes:
+      # Persisted checklist data. On Synology, point this at something like
+      # /volume1/docker/recurring-checklist/data
+      - ./data:/app/data