add source code and readme

manifests/cluster/flux-system/cluster-issuers.yaml

@@ -0,0 +1,18 @@
+---
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: cluster-issuers
+  namespace: flux-system
+spec:
+  interval: 10m0s
+  path: ./manifests/infrastructure/cluster-issuers
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    name: flux-system
+  healthChecks:
+    - apiVersion: helm.toolkit.fluxcd.io/v2beta1
+      kind: HelmRelease
+      name: cert-manager
+      namespace: cert-manager