docker-compose.yml

services:
  db:
    image: postgres:16
    restart: unless-stopped
    environment:
      POSTGRES_USER: promptaid
      POSTGRES_PASSWORD: promptaid
      POSTGRES_DB: promptaid
    ports:
      - "5432:5432"   # host → container
    volumes:
      - db_data:/var/lib/postgresql/data

volumes:
  db_data: