fix(avatar): prevent stale deployment images

digital-avatar-app/docker-compose.yml

@@ -1,42 +1,55 @@
 # 会会数字分身 —— Docker 测试实例（独立端口，不干扰现有 :8088 huihui 部署）
 services:
   avatar-backend:
-    build: ./backend
-    image: avatar-test-backend:latest
+    build:
+      context: ./backend
+      args:
+        APP_GIT_SHA: ${APP_GIT_SHA:?APP_GIT_SHA must be the full release commit}
+        APP_BUILD_TIME: ${APP_BUILD_TIME:?APP_BUILD_TIME must be set}
+    image: avatar-test-backend:${APP_GIT_SHA}
     container_name: avatar-test-backend
     restart: unless-stopped
     env_file:
       - .env
     environment:
-      DATABASE_URL: sqlite:////data/avatar.db
-      UPLOAD_DIR: /data/uploads
+      DATABASE_URL: sqlite:////app/avatar.db
+      UPLOAD_DIR: /app/uploads
       CHAT_MODEL_CONFIG_URL: http://host.docker.internal:8000/api/ai-models/runtime/digital-avatar
     extra_hosts:
       - "host.docker.internal:host-gateway"
     volumes:
-      - avatar-data:/data
+      - ${AVATAR_DB_PATH:?AVATAR_DB_PATH must point to the persistent avatar.db}:/app/avatar.db
+      - ${AVATAR_UPLOAD_DIR:?AVATAR_UPLOAD_DIR must point to persistent uploads}:/app/uploads
     expose:
       - "8000"
     ports:
       - "8011:8000"   # 仅用于直接调试 API；前端经内部网络访问，不走 host 端口
+    healthcheck:
+      test: ["CMD", "python", "-c", "import json,urllib.request; d=json.load(urllib.request.urlopen('http://127.0.0.1:8000/api/health', timeout=5))['data']; assert d['status']=='ok' and all(d['checks'].values())"]
+      interval: 10s
+      timeout: 8s
+      retries: 12
+      start_period: 20s
     networks:
       - avatar-net
 
   avatar-frontend:
-    build: .
-    image: avatar-test-frontend:latest
+    build:
+      context: .
+      args:
+        APP_GIT_SHA: ${APP_GIT_SHA:?APP_GIT_SHA must be the full release commit}
+        APP_BUILD_TIME: ${APP_BUILD_TIME:?APP_BUILD_TIME must be set}
+    image: avatar-test-frontend:${APP_GIT_SHA}
     container_name: avatar-test-frontend
     restart: unless-stopped
     ports:
       - "8099:80"     # 浏览器访问 http://<host>:8099
     depends_on:
-      - avatar-backend
+      avatar-backend:
+        condition: service_healthy
     networks:
       - avatar-net
 
 networks:
   avatar-net:
     driver: bridge
-
-volumes:
-  avatar-data: