Make nameservers and base_domain configurable

roles/headscale/defaults/main.yml

@@ -13,3 +13,5 @@ headscale_download_url: "https://github.com/juanfont/headscale/releases/download
 headscale_dir: /srv/headscale
 headscale_server_url: http://127.0.0.1:8080
 headscale_listen_addr: 0.0.0.0:8080
+headscale_nameservers: ['1.1.1.1']
+headscale_base_domain: example.org

roles/headscale/templates/etc/headscale/config.yaml.j2

@@ -191,7 +191,9 @@ acl_policy_path: ""
 dns_config:
   # List of DNS servers to expose to clients.
   nameservers:
-    - 1.1.1.1
+    {% for nameserver in headscale_nameservers %}
+    - {{ nameserver }}
+    {% endfor %}
 
   # Split DNS (see https://tailscale.com/kb/1054/dns/),
   # list of search domains and the DNS to query for each one.
@@ -214,7 +216,7 @@ dns_config:
   # `base_domain` must be a FQDNs, without the trailing dot.
   # The FQDN of the hosts will be
   # `hostname.namespace.base_domain` (e.g., _myhost.mynamespace.example.com_).
-  base_domain: example.com
+  base_domain: {{ headscale_base_domain }}
 
 # Unix socket used for the CLI to connect without authentication
 # Note: for local development, you probably want to change this to: