services:
  web:
    build: { context: ., dockerfile: deploy/Dockerfile.web }
    ports: ["8080:80"]
    depends_on: [api]
  api:
    build: { context: ., dockerfile: deploy/Dockerfile.api }
    environment:
      DATABASE_URL: postgres://lib:lib@postgres:5432/lib?sslmode=disable
      REDIS_URL: redis://redis:6379
      JWT_SECRET: ${JWT_SECRET}
      ADMIN_USER: ${ADMIN_USER}
      ADMIN_PASSWORD: ${ADMIN_PASSWORD}
      BOOKS_DIR: /data/books
      CACHE_DIR: /data/cache
      SCAN_INTERVAL_SEC: ${SCAN_INTERVAL_SEC:-60}
    volumes:
      - ./library:/data/books
      - cache:/data/cache
    depends_on:
      postgres: { condition: service_healthy }
      redis: { condition: service_started }
  postgres:
    image: postgres:16-alpine
    environment: { POSTGRES_USER: lib, POSTGRES_PASSWORD: lib, POSTGRES_DB: lib }
    volumes: [pgdata:/var/lib/postgresql/data]
    healthcheck: { test: ["CMD-SHELL", "pg_isready -U lib"], interval: 2s, timeout: 2s, retries: 30 }
  redis:
    image: redis:7-alpine
    command: ["redis-server", "--maxmemory", "128mb", "--maxmemory-policy", "allkeys-lru"]
    # 故意无 volume:redis 里全是可再生数据(spec §6.2)
volumes:
  pgdata:
  cache: