docker-compose.yml

# Specify the version of the Docker Compose.
version: "3.9"

# Define the services and applications that make up your application.
services:
  question-service:
    container_name: question-service
    build: ./backend/question-service # Path to the directory containing the Dockerfile for building the question-service image.
    ports:
      - 5000:5000 # Maps port 5000 on the host to port 5000 in the container, making the app accessible on the host.
    volumes:
      - ./backend/question-service:/app # Mounts the host directory './backend/question-service' to '/app' in the container.
      - /app/node_modules # Anonymous Volume
    networks:
      - peerprep-network # Connects the question-service to the 'peerprep-network' network.

  user-service:
    container_name: user-service
    build: ./backend/user-service # Path to the directory containing the Dockerfile for building the user-service image.
    ports:
      - 5001:5001 # Maps port 5001 on the host to port 5001 in the container, making the app accessible on the host.
    volumes:
      - ./backend/user-service:/app # Mounts the host directory './backend/user-service' to '/app' in the container.
      - /app/node_modules # Anonymous Volume
    networks:
      - peerprep-network # Connects the user-service to the 'peerprep-network' network.

  rabbitmq:
    image: rabbitmq:3-management
    container_name: rabbitmq
    ports:
      - 5672:5672 # rabbitmq server port
      - 15672:15672 # rabbitmq management port
    volumes:
      - rabbitmq_data:/var/lib/rabbitmq
    networks:
      - peerprep-network # Connects rabbitmq server to the 'peerprep-network' network.
    healthcheck: # check status of rabbitmq server
      test: rabbitmq-diagnostics check_port_connectivity
      interval: 1s
      timeout: 5s
      retries: 10
      start_period: 10s

  matching-service:
    container_name: matching-service
    environment:
      - RABBIT_HOSTNAME=rabbitmq # URL to connect to rabbitmq container in the network
      - API_GATEWAY_URL=http://api-gateway:8000
    depends_on: # condition to wait for rabbitmq container to be ready
      rabbitmq:
        condition: service_healthy 
    build: ./backend/matching-service # Path to the directory containing the Dockerfile for building the matching-service image.
    volumes:
      - ./backend/matching-service:/app # Mounts the host directory './backend/matching-service' to '/app' in the container.
      - /app/node_modules # Anonymous Volume
    networks:
      - peerprep-network # Connects the matching-service to the 'peerprep-network' network.

  collaboration-service:
    container_name: collaboration-service
    environment:
      - URL_QUESTION_SERVICE=http://question-service:5000/question
      - API_GATEWAY_URL=http://api-gateway:8000
    build: ./backend/collaboration-service # Path to the directory containing the Dockerfile for building the collaboration-service image.
    ports:
      - 5003:5003 # Maps port 5003 on the host to port 5003 in the container, making the app accessible on the host.
    volumes:
      - ./backend/collaboration-service:/app # Mounts the host directory './backend/collaboration-service' to '/app' in the container.
      - /app/node_modules # Anonymous Volume
    networks:
      - peerprep-network # Connects the collaboration-service to the 'peerprep-network' network.

  api-gateway:
    container_name: api-gateway
    environment:
      - QUESTION_SERVICE_URL=http://question-service:5000/question
      - USER_SERVICE_URL=http://user-service:5001/user
      - COLLABORATION_SERVICE_URL=http://collaboration-service:5003/collaboration
    depends_on:
      question-service:
        condition: service_started
      user-service:
        condition: service_started
      collaboration-service:
        condition: service_started
    build: ./backend/api-gateway # Path to the directory containing the Dockerfile for building the api-gateway image.
    ports:
      - 8000:8000 # Maps port 8000 on the host to port 8000 in the container, making the app accessible on the host.
    volumes:
      - ./backend/api-gateway:/app # Mounts the host directory './backend/api-gateway' to '/app' in the container.
      - /app/node_modules # Anonymous Volume
    networks:
      - peerprep-network # Connects the api-gateway to the 'peerprep-network' network.
    
  frontend:
    container_name: frontend
    environment:
      - REACT_APP_API_GATEWAY_URL=http://localhost:8000
    build: ./frontend
    ports:
      - 3000:3000
    volumes:
      - ./frontend:/app
      - /app/node_modules
    networks:
      - peerprep-network
    depends_on:
      - api-gateway

volumes:
  rabbitmq_data:

networks:
  peerprep-network: # Defines a network named 'peerprep-network'.
    name: peerprep-network
    driver: bridge # Uses the bridge driver for the network, which is the default and most common network type in Docker.