clean up nas roles

plays/nodes/nas.yml

@@ -5,6 +5,7 @@
   vars_files:
     - "{{ inventory_dir }}/vars/vault.yaml"
   roles:
-    - role: docker
-    - role: cloud-backups
-    - role: statusservices
+    - docker
+    - cloud-backups
+    - statusservices
+    - mergerfs