docker-compose.yml

# Production Docker Swarm stack — Python FastAPI app
# Usage: TAG=v1 docker stack deploy -c docker-compose.yml myapp
services:
  app:
    image: ${REGISTRY:-registry.local}/python-app:${TAG:-latest}
    secrets:
      - database_url
      - secret_key
    entrypoint: ["/app/entrypoint.sh"]
    command: ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000", "--workers", "2"]
    environment:
      DEPLOYMENT: production
      PORT: "8000"
      APP_DOMAIN: ${APP_DOMAIN:-localhost}
    deploy:
      labels:
        caddy: ${APP_DOMAIN:-localhost}
        caddy.reverse_proxy: "{{upstreams 8000}}"
      replicas: 1
      update_config:
        parallelism: 1
        delay: 10s
        order: start-first
    volumes:
      - appdata:/app/data

secrets:
  database_url:
    external: true
  secret_key:
    external: true

volumes:
  appdata: