java-tutorials/docker-modules/docker-compose/two-compose-share-same-network/join-existing-network/docker-compose-my-app-service.yaml

services:
  my_app:
    image: web-app:latest
    container_name: web-app
    ports:
      - "8080:8080"
    networks:
      - network-example

networks:
  network-example:
    external: true