Installer: Make Private network optional

Change-Id: Ic7a2e5250a42dc03de2416b1e2a0d1bbca3f010c
diff --git a/core/installer/values-tmpl/certificate-issuer-private.cue b/core/installer/values-tmpl/certificate-issuer-private.cue
index eef76d3..4707fa1 100644
--- a/core/installer/values-tmpl/certificate-issuer-private.cue
+++ b/core/installer/values-tmpl/certificate-issuer-private.cue
@@ -23,9 +23,8 @@
 		}]
 		values: {
 			issuer: {
-				name: issuerPrivate
+				name: "\(global.id)-private"
 				server: "https://acme-v02.api.letsencrypt.org/directory"
-				// server: "https://acme-staging-v02.api.letsencrypt.org/directory"
 				domain: global.privateDomain
 				contactEmail: global.contactEmail
 			}