version: '3'

services:
  server:
    image: test
    container_name: test_server
    environment:
      - SIMPLE_ONE=true
      - SAMPLE_TO_BE_OVERRIDDEN=original
    expose:
      - "3000"
    dns:
      - 1.1.1.1
      - 8.8.8.8
    dns_search: first.search.domain.com
    external_links:
      - other_service_1
      - common_service:alias1
    labels:
      - "simplelabel.first=Foo" 
      - "complexlabel=original"
    tmpfs:
      - /base-tmpdir
    volumes:
      - /simple/base/volume
      - /base/dir:/common/mount/point