Add admin deployment sync

README.md

@@ -28,6 +28,8 @@ services:
       - INITIAL_ADMIN_PASSWORD=Start123
       - FULLS_DIR=/app/public/images/fulls
       - THUMBS_DIR=/app/public/images/thumbs
+      - SYNC_IMAGE=ghcr.io/kroonk/photography:latest
+      - SYNC_CONTAINER=photography-website
     volumes:
       - /path/to/nextcloud/data:/app/public/images/fulls:ro
       - thumbs:/app/public/images/thumbs
@@ -44,6 +46,8 @@ Change the initial admin password after the first login. If you prefer not to st
 node -e "const bcrypt = require('bcryptjs'); console.log(bcrypt.hashSync('your-admin-password', 10));"
 ```
 
+The admin dashboard includes a sync button that pulls `SYNC_IMAGE` and restarts `SYNC_CONTAINER`. This requires the Docker socket mount shown above.
+
 ## Credits & License
 - Originally based on a Jekyll template.
 - UI Design by [AJ / HTML5 UP](https://html5up.net).