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.prod.yaml

@@ -0,0 +1,19 @@
+# Manual docker compose on a host with infra/docker/.env.prod present.
+# Prefer compose.truenas.yaml for TrueNAS Custom App UI.
+
+services:
+  web:
+    build:
+      context: ../..
+      dockerfile: infra/docker/Dockerfile
+    image: gitea.mysuperlab.netcraze.pro/danilka/gallery-web:latest
+    container_name: gallery-web
+    restart: unless-stopped
+    ports:
+      - "5173:5173"
+    env_file:
+      - .env.prod
+    volumes:
+      - /mnt/BasePool/Applications/Gallery/data/images:/app/data/images
+    extra_hosts:
+      - "host.docker.internal:host-gateway"