services:
  portfolio:
    # SPOT: IMAGE_NAME comes from .env (see env.example). No default —
    # an empty tag would have compose fall back to `portfolio-portfolio`
    # silently, which `make run-dev` would then fail to find.
    image: ${IMAGE_NAME:?IMAGE_NAME must be set in .env (see env.example)}
    build:
      context: .
      dockerfile: Dockerfile
    container_name: portfolio
    ports:
      - "${PORT:?PORT must be set in .env (see env.example)}:${PORT:?PORT must be set in .env (see env.example)}"
    env_file:
      - .env
    volumes:
      - ./app:/app
      - node_modules:/app/node_modules
      - vendor:/app/static/vendor
    # Run `npm install` on every container start so the named volumes
    # reflect the current package.json (postinstall regenerates vendor/).
    command: sh -c "npm install --prefix /app --no-audit --no-fund && python app.py"
    restart: unless-stopped

volumes:
  node_modules:
  vendor: