Docker compose azure public & private image

version: "3.4"
services:
  app:
    image: csym023.azurecr.io/csym023_app:latest
    ports:
      - "8080:8080"
    restart: always
    depends_on:
      - api
  api:
    image: csym023.azurecr.io/csym023_api:latest
    ports:
      - "3000:80"
    links:
      - docker-in-docker
    restart: always
    environment:
      DOCKER_HOST: http://docker-in-docker:2375
      DOCKER_TLS_CERTDIR: ""
  docker-in-docker:
    restart: always
    image: docker:latest
    environment:
      DOCKER_TLS_CERTDIR: ""
    volumes:
      - ${WEBAPP_STORAGE_HOME}/var/lib/docker
    expose:
      - 2375
      - 2376