Complete compose.yaml

# BookNest: Nginx front end, Node.js API, PostgreSQL 18. Settings come from the shell or .env.
name: booknest
x-pg-env: &pg-env
  PGHOST: db
  PGUSER: ${POSTGRES_USER:-booknest}
  PGPASSWORD: ${POSTGRES_PASSWORD:-booknest}
  PGDATABASE: ${POSTGRES_DB:-booknest}
services:
  web:
    build:
      context: .
      dockerfile: web/Dockerfile
    ports:
      - "${WEB_PORT:-8080}:80"
    depends_on:
      api:
        condition: service_healthy
        restart: true
    restart: on-failure
    develop:
      watch:
        - action: sync
          path: ./public
          target: /usr/share/nginx/html
  api:
    build: .
    ports:
      - "${API_PORT:-3000}:3000"
    environment: *pg-env
    depends_on:
      db:
        condition: service_healthy
        restart: true
    restart: on-failure
    develop:
      watch:
        - action: sync+restart
          path: ./app.js
          target: /app/app.js
        - action: rebuild
          path: package-lock.json
  db:
    image: postgres:18
    environment:
      POSTGRES_USER: ${POSTGRES_USER:-booknest}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-booknest}
      POSTGRES_DB: ${POSTGRES_DB:-booknest}
    ports:
      - "127.0.0.1:${DB_PORT:-5432}:5432"
    volumes:
      - pgdata:/var/lib/postgresql
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -h 127.0.0.1 -U $${POSTGRES_USER} -d $${POSTGRES_DB}"]
      interval: 10s
      timeout: 3s
      retries: 5
      start_period: 30s
      start_interval: 1s
  test:
    build:
      context: .
      target: test
    profiles: [test]
    environment: *pg-env
    depends_on:
      db:
        condition: service_healthy
volumes:
  pgdata: