fix(cert): switch to letsencrypt-prod and remove unused staging issuer

Author: soohyunme

infrastructure/base/cert-manager/clusterissuer.yaml

@@ -1,20 +1,4 @@
 ---
-# Let's Encrypt Staging
-apiVersion: cert-manager.io/v1
-kind: ClusterIssuer
-metadata:
-  name: letsencrypt-staging
-spec:
-  acme:
-    server: https://acme-staging-v02.api.letsencrypt.org/directory
-    email: webmaster@example.com
-    privateKeySecretRef:
-      name: letsencrypt-staging-account-key
-    solvers:
-    - http01:
-        ingress:
-          ingressClassName: nginx
----
 # Let's Encrypt Production
 apiVersion: cert-manager.io/v1
 kind: ClusterIssuer

infrastructure/overlays/prod/cert-manager-email-patch.yaml

@@ -1,13 +1,5 @@
 apiVersion: cert-manager.io/v1
 kind: ClusterIssuer
-metadata:
-  name: letsencrypt-staging
-spec:
-  acme:
-    email: soohyun.dev+letsencrypt@gmail.com
----
-apiVersion: cert-manager.io/v1
-kind: ClusterIssuer
 metadata:
   name: letsencrypt-prod
 spec:

services/homepage/overlays/prod/ingress.yaml

@@ -4,7 +4,7 @@ kind: Ingress
 metadata:
   name: homepage-ingress
   annotations:
-    cert-manager.io/cluster-issuer: "letsencrypt-staging"
+    cert-manager.io/cluster-issuer: "letsencrypt-prod"
     nginx.ingress.kubernetes.io/ssl-redirect: "true"
 spec:
   ingressClassName: nginx