Docker compose modification

[dranoto]

The default docker compose example exposes the port to the mongodb, pins it to 0.0.0.0 by default. For security awareness, especially new users running this compose file on a VPS, it should be referenced by name rather than open the port. Then the DB can only be accessed from within the docker local network that is created between these two services.

services:
  app:
    image: sanjeet990/astroluma:latest
    container_name: astroluma
    ports:
      - 8000:8000
    environment:
      PORT: 8000
      NODE_ENV: production
      SECRET_KEY: a2c5f9a8b2d7e1a7f2c9c8d9b5f7a3d5
      MONGODB_URI: mongodb://mongodb:27017/astroluma  # Connect to MongoDB by service name
    volumes:
      - uploads_data:/app/storage/uploads
    depends_on:
      - mongodb
    restart: always
    # Removed network_mode: host

  mongodb:
    image: mongo:6.0
    container_name: astroluma_mongodb
    # Removed ports: - "27017:27017" 
    volumes:
      - mongo_data:/data/db
    restart: always

volumes:
  mongo_data:
  uploads_data: