nginx-proxy/test/test_default-host.yml

# GIVEN a webserver with VIRTUAL_HOST set to web1.tld
web1:
  image: web
  expose:
    - "81"
  environment:
    WEB_PORTS: 81
    VIRTUAL_HOST: web1.tld


# WHEN nginx-proxy runs with DEFAULT_HOST set to web1.tld
sut:
  image: nginxproxy/nginx-proxy:test
  volumes:
    - /var/run/docker.sock:/tmp/docker.sock:ro
  environment:
    DEFAULT_HOST: web1.tld