Env: configure urls and help documents

Change-Id: I9522e074575e0c1e67735462ac4cc266ab1ebb8c
diff --git a/core/installer/values-tmpl/pihole.cue b/core/installer/values-tmpl/pihole.cue
index 37a44d5..d1b9097 100644
--- a/core/installer/values-tmpl/pihole.cue
+++ b/core/installer/values-tmpl/pihole.cue
@@ -5,6 +5,7 @@
 }
 
 _domain: "\(input.subdomain).\(input.network.domain)"
+url: "https://\(_domain)"
 
 name: "Pi-hole"
 namespace: "app-pihole"