Add dev/prod environments with TrueNAS Docker production deploy.

Split PostgreSQL into gallery_dev and gallery_prod, add Docker/Gitea deploy tooling,
SMB image sync, pgAdmin split script, dev:web on Keenetic :5173, and operator docs.

Co-authored-by: Cursor <cursoragent@cursor.com>

infra/docker/compose.truenas.yaml

@@ -0,0 +1,34 @@
+# Paste into TrueNAS: Apps → Custom App → Install via Docker Compose
+#
+# BEFORE deploy:
+#   1. npm run docker:publish on dev PC (image must exist in Gitea)
+#   2. Replace YOUR_POSTGRES_PASSWORD below
+#   3. Gitea pull credentials on TrueNAS (read:package token)
+#   4. mkdir + chown image dir; npm run images:sync-to-prod
+#   5. Keenetic: gallery.mysuperlab.netcraze.pro → 192.168.10.122:5173, protocol http
+#
+# See infra/docker/DEPLOY-truenas.md and Documentation/environments.md
+services:
+  web:
+    image: gitea.mysuperlab.netcraze.pro/danilka/gallery-web:latest
+    container_name: gallery-web
+    restart: unless-stopped
+    pull_policy: always
+    ports:
+      - "5173:5173"
+    environment:
+      NODE_ENV: production
+      PORT: "5173"
+      HOST: "0.0.0.0"
+      DB_HOST: "192.168.10.122"
+      DB_PORT: "5432"
+      DB_USER: gallery
+      DB_PASSWORD: gallery
+      DB_NAME: gallery_prod
+      PUBLIC_URL: https://gallery.mysuperlab.netcraze.pro
+      TRUST_PROXY: "true"
+      IMAGE_DIR: /app/data/images
+    volumes:
+      - /mnt/BasePool/Applications/Gallery/data/images:/app/data/images
+    extra_hosts:
+      - "host.docker.internal:host-gateway"