add notification on planned DESY services downtime

index.md

@@ -6,6 +6,11 @@ additional_css:
     - frontpage.css
     - title/service-title-buttons.css
 additional_js: frontpage.js
+notification:
+  title: "DESY Cloud Services Maintenance"
+  description: "On November 8th, 8-18 o'clock CET, the DESY Openstack Cloud will undergo maintenance.
+  Most DESY Helmholtz Cloud services will not be available then.
+  HIFIS Events Service and DESY Sync&Share may be available if you log in before the maintenance time window."
 excerpt:
   "HIFIS aims to provide excellent, seamlessly accessible IT services for the
   whole Helmholtz Association."