Only one domain is allowed it seems

templates/Wiki.js/0/rancher-compose.yml

@@ -20,7 +20,7 @@ catalog:
       label: "Public Host Domain"
       description: |
         The host that Traefik will use to provide public access.
-        Separate multiple domains by using a comma.
+        Only one domain is allowed by Wiki.js
       default: "subdomain.domain.tld"
       required: true
       type: string