Add selfsigned certs, external-secrets

kubernetes/apps/external-secrets/namespace.yaml

@@ -0,0 +1,8 @@
+---
+# yaml-language-server: $schema=https://kubernetesjsonschema.dev/v1.18.1-standalone-strict/namespace-v1.json
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: external-secrets
+  labels:
+    kustomize.toolkit.fluxcd.io/prune: disabled