add app prometheus-operator

kubernetes/apps/prometheus-operator/prometheus-operator.yaml

@@ -0,0 +1,14 @@
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: prometheus-operator
+  namespace: flux-system
+spec:
+  interval: 1h
+  targetNamespace: cert-manager
+  path: ./kubernetes/templates/apps/prometheus-operator
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    namespace: flux-system
+    name: flux-system