🌐 Lab 02. Nginx + PHP-FPM + PostgreSQL 3-Tier 컴포즈 환경 구축

services:
  # ========================================================
  # 1. Web Tier: Nginx 웹서버 (리버스 프록시)
  # ========================================================
  web:
    image: nginx:alpine
    container_name: expedition_web
    restart: unless-stopped
    ports:
      - "${HTTP_PORT:-8080}:80"
    volumes:
      # 라라벨 정적 파일 직접 서빙을 위한 소스코드 마운트
      - ./src:/var/www/html:ro
      # Nginx 가상호스트 설정 파일 마운트
      - ./docker/nginx/default.conf:/etc/nginx/conf.d/default.conf:ro
    depends_on:
      - was
    networks:
      - expedition_net

  # ========================================================
  # 2. App Tier: PHP 8.5 라라벨 WAS (PHP-FPM)
  # ========================================================
  was:
    build:
      context: .
      dockerfile: docker/php/Dockerfile
    container_name: expedition_was
    restart: unless-stopped
    environment:
      DB_CONNECTION: ${DB_CONNECTION}
      DB_HOST: ${DB_HOST}
      DB_PORT: ${DB_PORT}
      DB_DATABASE: ${DB_DATABASE}
      DB_USERNAME: ${DB_USERNAME}
      DB_PASSWORD: ${DB_PASSWORD}
    volumes:
      # [핵심] 호스트 코드를 컨테이너에 직결하여 핫리로드 구현
      - ./src:/var/www/html
    depends_on:
      pgsql:
        condition: service_healthy
    networks:
      - expedition_net

  # ========================================================
  # 3. Data Tier: PostgreSQL 16 데이터베이스
  # ========================================================
  pgsql:
    image: postgres:16-alpine
    container_name: expedition_pgsql
    restart: unless-stopped
    environment:
      POSTGRES_DB: ${DB_DATABASE:-laravel_expedition}
      POSTGRES_USER: ${DB_USERNAME:-dorothy}
      POSTGRES_PASSWORD: ${DB_PASSWORD:-secret_docker_pass}
    ports:
      # 로컬 DBeaver나 DataGrip 등 DB 툴 접속용 포트 개방
      - "${PGSQL_PORT:-5432}:5432"
    volumes:
      # [핵심] 컨테이너가 죽어도 DB 데이터가 보존되는 영속 볼륨
      - pgsql_data:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U ${DB_USERNAME:-dorothy} -d ${DB_DATABASE:-laravel_expedition}"]
      interval: 5s
      timeout: 5s
      retries: 5
    networks:
      - expedition_net

# ========================================================
# 볼륨 및 네트워크 정의
# ========================================================
volumes:
  pgsql_data:
    driver: local

networks:
  expedition_net:
    driver: bridge