job "traefik" {
    datacenters = ["dc1"]
    type = "service"

    group "traefik" {
        network {
            port "http" {
                host_network = "public"
            }
        }

        task "prepare" {
            lifecycle {
                hook = "prestart"
            }

            driver = "docker"
            config {
                image = "registry.service.consul:5000/hetzner-dns-updater:latest"
            }

            env {
                HETZNER_DNS_API_TOKEN = "your-api-token" # better use Hashicorp Vault for that
                DNS_ZONE_NAME = "example.com"
                DNS_RECORD_NAME = "ingress.cluster"  
                DNS_RECORD_TYPE = "A"
                DNS_RECORD_VALUE = "${NOMAD_IP_http}"
                DNS_RECORD_TTL = "60"
            }
        }

        task "traefik" {
            # ...
        }
    }
}

- support using existing environment variables:
  i.e. when running with network `mode = "host"` we can use "HOSTNAME"
- support updating multiple records (i.e. A and AAAA).