services:

  # ── FastAPI application ──────────────────────────────────────────────────
  api:
    build: .                      # build from the Dockerfile in this directory
    expose:
      - "8000"                    # only expose internally to other containers, NOT to the internet
    volumes:
      - notes_data:/app/data      # persist notes.db outside the container
    env_file:                    
      - .env                     
    environment:
      - DATABASE_URL=sqlite:////app/data/notes.db   # 4 slashes = absolute path in SQLite URL
    restart: always               # auto-restart if the container crashes

  # ── Nginx reverse proxy ──────────────────────────────────────────────────
  nginx:
    image: nginx:alpine           # lightweight official Nginx image
    ports:
      - "80:80"                   # expose port 80 to the internet
    volumes:
      - ./nginx/nginx.conf:/etc/nginx/conf.d/default.conf   # mount our custom config
    depends_on:
      - api                       # start api container before nginx
    restart: always

# ── Named volume for SQLite data persistence ─────────────────────────────
volumes:
  notes_data:
  # Docker manages this volume — data survives container rebuilds and restarts
  # Location on EC2 host: /var/lib/docker/volumes/fastai-notes_notes_data/