feat: only store cluster-issuers in core kustomization

Signed-off-by: Devin Buhl <devin@buhl.casa>

cluster/core/cluster-issuers/kustomization.yaml

@@ -0,0 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - letsencrypt-production.yaml
+  - letsencrypt-staging.yaml
+  - secret.sops.yaml

cluster/core/cluster-issuers/letsencrypt-production.yaml

@@ -0,0 +1,21 @@
+---
+apiVersion: cert-manager.io/v1
+kind: ClusterIssuer
+metadata:
+  name: letsencrypt-production
+spec:
+  acme:
+    server: https://acme-v02.api.letsencrypt.org/directory
+    email: "${SECRET_CLOUDFLARE_EMAIL}"
+    privateKeySecretRef:
+      name: letsencrypt-production
+    solvers:
+      - dns01:
+          cloudflare:
+            email: "${SECRET_CLOUDFLARE_EMAIL}"
+            apiKeySecretRef:
+              name: cloudflare-api-key
+              key: api-key
+        selector:
+          dnsZones:
+            - ${SECRET_DOMAIN}

cluster/core/cluster-issuers/letsencrypt-staging.yaml

@@ -0,0 +1,21 @@
+---
+apiVersion: cert-manager.io/v1
+kind: ClusterIssuer
+metadata:
+  name: letsencrypt-staging
+spec:
+  acme:
+    server: https://acme-staging-v02.api.letsencrypt.org/directory
+    email: "${SECRET_CLOUDFLARE_EMAIL}"
+    privateKeySecretRef:
+      name: letsencrypt-staging
+    solvers:
+      - dns01:
+          cloudflare:
+            email: "${SECRET_CLOUDFLARE_EMAIL}"
+            apiKeySecretRef:
+              name: cloudflare-api-key
+              key: api-key
+        selector:
+          dnsZones:
+            - ${SECRET_DOMAIN}