Add Watchtower for automatic Docker updates

backend/following.json

@@ -1,4 +1,5 @@
 [
   "nhythanh_04",
-  "po.trann77"
+  "po.trann77",
+  "tieu_hy26"
 ]

docker-compose.yml

@@ -17,7 +17,6 @@ services:
       - CACHE_TTL_HOURS=24
       - ADMIN_PASSWORD=admin123 # Change this to your secure password
     shm_size: '2gb'
-    # IMPORTANT: You must link the service to the network
     networks:
       - purestream_net
     healthcheck:
@@ -26,6 +25,24 @@ services:
       timeout: 10s
       retries: 3
       start_period: 60s
+    labels:
+      - "com.centurylinklabs.watchtower.enable=true"
+
+  # Auto-updater: Checks for new images every 5 minutes
+  watchtower:
+    image: containrrr/watchtower
+    container_name: watchtower
+    restart: unless-stopped
+    volumes:
+      - /var/run/docker.sock:/var/run/docker.sock
+    environment:
+      - WATCHTOWER_CLEANUP=true # Remove old images
+      - WATCHTOWER_POLL_INTERVAL=300 # Check every 5 minutes
+      - WATCHTOWER_INCLUDE_RESTARTING=true
+      - WATCHTOWER_ROLLING_RESTART=true # Graceful restart
+      - WATCHTOWER_LABEL_ENABLE=true # Only update labeled containers
+    networks:
+      - purestream_net
 
 networks:
   purestream_net: