feat(docker): add admin-backend service to docker-compose.prod.yml

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker/docker-compose.prod.yml

@@ -298,6 +298,40 @@ services:
           memory: 64M
           cpus: '0.25'
 
+  # ==================== Admin Backend ====================
+  admin-backend:
+    image: topfans/admin-backend:latest
+    build:
+      context: ../../TopFans-activity
+      dockerfile: docker/Dockerfile.admin
+    container_name: topfans-admin-backend
+    restart: always
+    environment:
+      <<: *common-env
+      DB_HOST: postgres
+      DB_PORT: 5432
+      DB_USER: postgres
+      DB_PASSWORD: ${DB_PASSWORD:-postgres123}
+      DB_NAME: topfans
+    depends_on:
+      postgres:
+        condition: service_healthy
+    networks:
+      - topfans-net
+    ports:
+      - "8081:8081"
+    healthcheck:
+      test: ["CMD-SHELL", "wget --no-verbose --tries=1 --spider http://localhost:8081/health || exit 1"]
+      <<: *healthcheck
+    deploy:
+      resources:
+        limits:
+          memory: 200M
+          cpus: '0.5'
+        reservations:
+          memory: 64M
+          cpus: '0.25'
+
 networks:
   topfans-net:
     driver: bridge