feat(traefik): allow exposure of dashboard via domain

roles/traefik/templates/dashboard.yml.j2

@@ -0,0 +1,16 @@
+{% set dashboard_ssl = use_ssl_dashboard | default(use_ssl) %}
+http:
+  routers:
+    dashboard:
+      rule: "Host(`{{ dashboard_domain }}`)"
+      service: api@internal
+      entryPoints:
+        - {{ 'websecure' if dashboard_ssl else 'web' }}
+{% if dashboard_ssl %}
+      tls:
+{% if cert_mode == 'acme' %}
+        certResolver: {{ ssl_cert_resolver }}
+{% else %}
+        {}
+{% endif %}
+{% endif %}