feat: add notes to all applications

src/content/docs/applications/ntfy.mdx

@@ -13,3 +13,15 @@ hero:
       link: https://gitea.alexlebens.dev/alexlebens/infrastructure/src/branch/main/clusters/cl01tl/helm/ntfy
       icon: right-arrow
 ---
+
+import { Aside } from '@astrojs/starlight/components';
+
+<Aside type="tip">Has an internal [Grafana Dashboard](https://grafana.alexlebens.net/goto/cfit8bbhovsw0d?orgId=1).</Aside>
+
+# Purpose
+
+Notification service based on a Pub/Sub model.
+
+# Notes
+
+Very useful service that sends notifications to my phone and is widely addopted by a lot of other apps or has bridging support such as through [apprise](https://github.com/caronc/apprise).