version: '3'    
services:    
  web:    
    build: ./web-server     
    container_name: dsa-web
    volumes:    
      - ./data/certbot/www:/var/www/certbot    
    restart: always    
  core:    
    build: ./core
    container_name: dsa-core
    restart: always    
    
networks:    
  default:    
    external:    
      name: frontend