version: '3'

services:
  server:
    image: test
    container_name: test_server
    environment:
      - SAMPLE_TO_BE_OVERRIDDEN=new
      - NEW_ONE=1234
    expose:
      - "5000"
    dns: 9.9.9.9
    dns_search:
      - second.search.domain.com
    external_links:
      - other_service_2
      - common_service:alias2
    labels:
      simplelabel.second: "Bar"
      complexlabel: override
    tmpfs: /additional-tmpdir
    volumes:
      - /additional/added/volume
      - /override/dir:/common/mount/point