Add else and items for loop to monit-dashboard

roles/monit-dashboard/tasks/main.yml

@@ -9,6 +9,7 @@
         owner: root
         group: root
         mode: 0600
+      with_items: groups['frames'] 
       notify:
         - restart monit-dashboard
       tags:

roles/monit-dashboard/templates/servers.json

@@ -3,7 +3,7 @@
         "url": "http://127.0.0.1:2812",
         "user": "{{ monit_web_user }}",
         "passwd": "{{ monit_web_pasword }}"
-    }{{ "," if items is defined and (items|length>0) }}
+    }{{ "," if items is defined and (items|length>0) else "" }}
 {% for frame in items %}
     "{{ frame.name }}": {
         "url": "http://{{ frame.wireguard_address }}:2812",