feat: caldav backup monitoring

roles/monitoring-master/files/services_async.conf

@@ -171,3 +171,12 @@ apply Service "mail_atlantishq" {
     vars.service_name = "mail_atlantishq"
     assign where host.name == "async_icinga"
 }
+
+apply Service "ths_caldav_backup" {
+    import "generic-service"
+    check_command = "gateway"
+    vars.protocol = "https"
+    vars.host = "async-icinga.atlantishq.de"
+    vars.service_name = "ths_caldav_backup"
+    assign where host.name == "async_icinga"
+}