# Demo docker-compose.yml for a 3-tier web app: web + api + postgres.
# Run: docker compose up -d
# Stop: docker compose down

services:
  web:
    build: ./web                     # frontend: nginx serving a built React app
    ports:
      - "8080:80"
    depends_on:
      - api

  api:
    build: ./api                     # backend: Spring Boot, Express, or Django
    environment:
      DB_URL: jdbc:postgresql://db:5432/app
      DB_USER: app
      DB_PASS: ${DB_PASS}            # set in .env (NOT committed)
      JWT_SECRET: ${JWT_SECRET}
    ports:
      - "8081:8080"
    depends_on:
      db:
        condition: service_healthy

  db:
    image: postgres:16
    environment:
      POSTGRES_USER: app
      POSTGRES_PASSWORD: ${DB_PASS}
      POSTGRES_DB: app
    volumes:
      - pgdata:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U app"]
      interval: 5s
      timeout: 5s
      retries: 10

volumes:
  pgdata: