docker-compose.yml

services:
  frontend:
    build: ./client # path to React + Vite dockerfile
    ports:
      - "3000:3000"
    depends_on:
      - backend

  backend:
    build: ./backend
    ports:
      - "8000:8000"
    depends_on:
      db:
        condition: service_healthy

    environment:
      - POSTGRES_URL=postgresql://postgres:postgres@db:5432/codesnippets
      - BACKEND_CORS_ORIGIN=http://localhost:3000

  db:
    image: postgres:17-alpine
    volumes:
      - postgres_data:/var/lib/postgresql/data/ # mounts or think of container data pointing to this volume
    expose:
      - 5432 # only for internal networking
    environment:
      - POSTGRES_USER=postgres
      - POSTGRES_PASSWORD=postgres
      - POSTGRES_DB=codesnippets
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"] # check if postgres sql server is ready to accept connections for this user
      interval: 5s
      timeout: 5s
      retries: 5

volumes:
  postgres_data: # creates empty managed docker volume for persistent storage