Add notification support

flux/cluster/base/flux-system/kustomization.yaml

@@ -3,3 +3,4 @@ kind: Kustomization
 resources:
   - gotk-components.yaml
   - gotk-sync.yaml
+  - notifications.yaml

flux/cluster/base/flux-system/notifications.yaml

@@ -0,0 +1,25 @@
+apiVersion: notification.toolkit.fluxcd.io/v1beta1
+kind: Provider
+metadata:
+  name: discord
+  namespace: flux-system
+spec:
+  type: discord
+  channel: general
+  secretRef:
+    name: discord
+---
+apiVersion: notification.toolkit.fluxcd.io/v1beta1
+kind: Alert
+metadata:
+  name: on-call-webapp
+  namespace: flux-system
+spec:
+  providerRef:
+    name: discord
+  eventSeverity: info
+  eventSources:
+    - kind: GitRepository
+      name: '*'
+    - kind: Kustomization
+      name: '*'