Import firewall role from network repo

Move, actually.

roles/alpine/tasks/main.yml

@@ -100,7 +100,7 @@
 - name: Set authorized SSH keys
   authorized_key:
     user: root
-    exclusive: true
+    #exclusive: true # is problematic if there are other keys (e.g. clusters)
     key: "{{ ssh_keys | join('\n') }}"
 
 - when: is_virtual