version: "3.5"

services:

  helloworld:
    image: tutum/hello-world
    ports:
      - 80:80
    expose: # this may be mis-usage, only to test expose with ports.
      - "3000"
      - "80"
    networks:
      - helloworld-network

networks:
  helloworld-network:
    name: helloworld-network