feat: migrate templates

blueprints/roundcube/template.yml

@@ -0,0 +1,14 @@
+variables:
+  main_domain: ${randomDomain}
+
+config:
+  domains:
+    - serviceName: roundcubemail
+      port: 80
+      host: ${main_domain}
+
+  env:
+    DEFAULT_HOST: "tls://mail.example.com"
+    SMTP_SERVER: "tls://mail.example.com"
+
+  mounts: []