fix default vars

defaults/main.yml

@@ -1,8 +1,6 @@
 ---
 # domain, webroot
 nextcloud_domain: example.com
-nextcloud_trusted_domains:
-  - "{{ nextcloud_domain }}"
 nextcloud_web_root: /
 
 # database
@@ -25,7 +23,8 @@ nextcloud_admin_user: admin
 nextcloud_admin_password: password
 
 # space separated trusted domains
-nextcloud_trusted_domains: ""
+nextcloud_trusted_domains:
+  - "{{ nextcloud_domain }}"
 
 # The install and update script is only triggered when a default command
 # is used (apache-foreground or php-fpm). If you use a custom command