添加Docker自包含部署分支

- 新增 Seg_Server_Docker 自包含部署内容，包含前后端、FastAPI、Celery、PostgreSQL、Redis、MinIO、演示视频和 DICOM 数据。

- 保留 demo 数据以支持恢复演示出厂设置，排除 SAM 2.1 .pt 权重并在 README 中补充下载命令。

- 补充 GPU 部署、backend/worker 镜像复用、frpc/frps + NPM 公网域名反代部署说明。

- 在 .env/.env.example 中用 # XXXX 标注局域网和公网域名部署需要修改的配置项。

- 添加部署分支 .gitignore，忽略本地模型权重、构建产物、缓存和日志。

docker-compose.yml

@@ -0,0 +1,131 @@
+services:
+  postgres:
+    image: postgres:16-alpine
+    container_name: seg-postgres
+    restart: unless-stopped
+    environment:
+      POSTGRES_USER: ${POSTGRES_USER:-seguser}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-segpass123}
+      POSTGRES_DB: ${POSTGRES_DB:-segserver}
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U $${POSTGRES_USER} -d $${POSTGRES_DB}"]
+      interval: 5s
+      timeout: 5s
+      retries: 20
+
+  redis:
+    image: redis:7-alpine
+    container_name: seg-redis
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD", "redis-cli", "ping"]
+      interval: 5s
+      timeout: 3s
+      retries: 20
+
+  minio:
+    image: minio/minio:RELEASE.2025-04-22T22-12-26Z
+    container_name: seg-minio
+    restart: unless-stopped
+    command: server /data --console-address ":9001"
+    environment:
+      MINIO_ROOT_USER: ${MINIO_ACCESS_KEY:-minioadmin}
+      MINIO_ROOT_PASSWORD: ${MINIO_SECRET_KEY:-minioadmin}
+    ports:
+      - "${MINIO_PORT:-9000}:9000"
+      - "${MINIO_CONSOLE_PORT:-9001}:9001"
+    volumes:
+      - minio-data:/data
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:9000/minio/health/live"]
+      interval: 5s
+      timeout: 5s
+      retries: 30
+
+  backend:
+    image: seg-server-backend:latest
+    build:
+      context: .
+      dockerfile: Dockerfile.backend
+    container_name: seg-backend
+    restart: unless-stopped
+    env_file: .env
+    environment:
+      DB_URL: postgresql://${POSTGRES_USER:-seguser}:${POSTGRES_PASSWORD:-segpass123}@postgres:5432/${POSTGRES_DB:-segserver}
+      REDIS_URL: redis://redis:6379/0
+      MINIO_ENDPOINT: minio:9000
+      MINIO_PUBLIC_ENDPOINT: ${MINIO_PUBLIC_ENDPOINT:-localhost:9000}
+      MINIO_ACCESS_KEY: ${MINIO_ACCESS_KEY:-minioadmin}
+      MINIO_SECRET_KEY: ${MINIO_SECRET_KEY:-minioadmin}
+      MINIO_SECURE: ${MINIO_SECURE:-false}
+      CORS_ORIGINS: ${CORS_ORIGINS:-["http://localhost:3000","http://127.0.0.1:3000"]}
+      DEMO_VIDEO_PATH: /app/demo/演视LC视频序列.mp4
+      DEMO_DICOM_DIR: /app/demo/演视DICOM序列
+      SAM_MODEL_PATH: /app/models/sam2.1_hiera_tiny.pt
+      SAM_MODEL_CONFIG: configs/sam2.1/sam2.1_hiera_t.yaml
+      SAM3_EXTERNAL_ENABLED: "false"
+    ports:
+      - "${BACKEND_PORT:-8000}:8000"
+    volumes:
+      - ${SAM_MODELS_DIR:-./models}:/app/models:ro
+      - ./demo:/app/demo:ro
+    depends_on:
+      postgres:
+        condition: service_healthy
+      redis:
+        condition: service_healthy
+      minio:
+        condition: service_healthy
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8000/health"]
+      interval: 10s
+      timeout: 5s
+      retries: 30
+
+  worker:
+    image: seg-server-backend:latest
+    pull_policy: never
+    container_name: seg-worker
+    restart: unless-stopped
+    command: celery -A celery_app:celery_app worker --loglevel=info --pool=solo --concurrency=1
+    env_file: .env
+    environment:
+      DB_URL: postgresql://${POSTGRES_USER:-seguser}:${POSTGRES_PASSWORD:-segpass123}@postgres:5432/${POSTGRES_DB:-segserver}
+      REDIS_URL: redis://redis:6379/0
+      MINIO_ENDPOINT: minio:9000
+      MINIO_PUBLIC_ENDPOINT: ${MINIO_PUBLIC_ENDPOINT:-localhost:9000}
+      MINIO_ACCESS_KEY: ${MINIO_ACCESS_KEY:-minioadmin}
+      MINIO_SECRET_KEY: ${MINIO_SECRET_KEY:-minioadmin}
+      MINIO_SECURE: ${MINIO_SECURE:-false}
+      DEMO_VIDEO_PATH: /app/demo/演视LC视频序列.mp4
+      DEMO_DICOM_DIR: /app/demo/演视DICOM序列
+      SAM_MODEL_PATH: /app/models/sam2.1_hiera_tiny.pt
+      SAM_MODEL_CONFIG: configs/sam2.1/sam2.1_hiera_t.yaml
+      SAM3_EXTERNAL_ENABLED: "false"
+    volumes:
+      - ${SAM_MODELS_DIR:-./models}:/app/models:ro
+      - ./demo:/app/demo:ro
+    depends_on:
+      backend:
+        condition: service_healthy
+
+  frontend:
+    build:
+      context: .
+      dockerfile: Dockerfile.frontend
+      args:
+        VITE_API_BASE_URL: ${VITE_API_BASE_URL:-}
+        VITE_WS_PROGRESS_URL: ${VITE_WS_PROGRESS_URL:-}
+    container_name: seg-frontend
+    restart: unless-stopped
+    ports:
+      - "${FRONTEND_PORT:-3000}:80"
+    depends_on:
+      backend:
+        condition: service_healthy
+
+volumes:
+  postgres-data:
+  minio-data: