compose.yaml

version: "3.8"  # Specifies the version of the Docker Compose file format.

services:  # Defines the services (containers) to be created.
  database:  # Service name for the PostgreSQL database.
    image: postgres:latest  # Uses the latest PostgreSQL image from Docker Hub.
    restart: always  # Automatically restarts the container if it stops.
    container_name: swiftchat_postgres  # Sets a specific name for the container.
    environment:  # Environment variables for PostgreSQL configuration.
      POSTGRES_DB: ${POSTGRE_DB}  # Database name from the .env file.
      POSTGRES_USER: ${POSTGRE_USER}  # User for the database from the .env file.
      POSTGRES_PASSWORD: ${POSTGRE_PASSWORD}  # Password for the database from the .env file.
    ports:
      - "5437:5432"  # Maps port 5437 on the host to port 5432 in the container.
    volumes:  # Mounts volumes for data persistence.
      - db:/var/lib/postgresql/data  # Persistent storage for the database data.
      - ./sql/init.sql:/docker-entrypoint-initdb.d/init.sql  # Initializes the database with a script.
    networks:
      - swiftchat_network  # Connects the container to a specified network.

  redis:  # Service name for the Redis cache.
    image: redis:latest  # Uses the latest Redis image from Docker Hub.
    restart: always  # Automatically restarts the container if it stops.
    container_name: swiftchat_redis  # Sets a specific name for the container.
    ports:
      - "6379:6379"  # Maps port 6379 on the host to port 6379 in the container.
    command: ["redis-server", "--requirepass", "${REDIS_PASSWORD}"]  # Starts Redis with password protection.
    volumes:
      - redis:/data  # Persistent storage for Redis data.
    networks:
      - swiftchat_network  # Connects the container to a specified network.

  swiftchat_api:  # Service name for the API.
    build: .  # Builds the image from the Dockerfile in the current directory.
    container_name: swiftchat_api  # Sets a specific name for the container.
    ports:
      - "9000:9000"  # Maps port 9000 on the host to port 9000 in the container.
    restart: on-failure  # Restarts the container only if it exits with a non-zero status.
    depends_on:  # Specifies dependency on other services.
      - database  # The API waits for the database to be ready.
      - redis  # The API waits for Redis to be ready.
    environment:  # Environment variables for the API.
      - POSTGRE_HOST=swiftchat_postgres  # Host for PostgreSQL (uses container name).
      - REDIS_HOST=swiftchat_redis:6379  # Host for Redis with port.
    env_file:
      - .env  # Loads environment variables from the .env file.
    networks:
      - swiftchat_network  # Connects the container to a specified network.

volumes:  # Defines named volumes for data persistence.
  db:  # Volume for PostgreSQL.
  redis:  # Volume for Redis.

networks:  # Defines networks for service communication.
  swiftchat_network:  # Custom bridge network.
    driver: bridge  # Specifies the network driver.