myos/stack/host/volumes.dns.yml

version: '3.6'

services:
  apache-php5:
    environment:
    - DOCUMENT_ROOT=/dns
    volumes:
    - dns:/dns
  nginx:
    environment:
    - DEFAULT=default_dns
    volumes:
    - dns:/dns
  php:
    volumes:
    - dns:/dns

volumes:
  dns: