[CNI] Classic CNI alerts (#23092)

* removed space

* added alerts

* refined text

* added alert notifications yml

* refined text

* Apply suggestions from code review

Co-authored-by: Pedro Sousa <[email protected]>

* removed examples

---------

Co-authored-by: Pedro Sousa <[email protected]>

Author: marciocloudflare

src/content/docs/network-interconnect/classic-cni/alerts.mdx

@@ -0,0 +1,15 @@
+---
+title: Alerts
+pcx_content_type: how-to
+---
+
+Set up alerts for Classic CNI to be notified of routine maintenance that may affect your service.
+
+1. Log in to the [Cloudflare dashboard](https://dash.cloudflare.com/login), and select your account.
+2. Go to **Notifications** > **Add**.
+3. From the drop-down menu, select _Cloudflare Network Interconnect_.
+4. Select **Connection Maintenance Alert**.
+5. Enter a name for the notification and select your preferred alert method.
+6. Select **Save**.
+
+You will now be alerted when there are routine maintenance events that impact Classic CNI.

src/content/docs/network-interconnect/classic-cni/index.mdx

@@ -3,7 +3,6 @@ title: Classic CNI
 pcx_content_type: concept
 sidebar:
   order: 5
-
 ---
 
 ## Types of interconnect

src/content/notifications/index.yaml

@@ -619,3 +619,10 @@ entries:
     associatedProducts: Cloudflare Images
     nextSteps: No action is needed.
     otherFilters: None.
+
+  - name: Connection Maintenance Alert
+    audience: "[Classic CNI](/network-interconnect/classic-cni/) customers who want to be alerted to maintenance events that might affect Classic CNI."
+    availability: Purchase of Cloudflare Network Interconnect (CNI).
+    associatedProducts: Network Interconnect
+    nextSteps: No action is needed.
+    otherFilters: None.