[Assets] Nextcloud: add plain listener

data/assets/nextcloud/nextcloud.conf

@@ -5,6 +5,7 @@ map $http_x_forwarded_proto $client_req_scheme_nc {
 
 server {
   include /etc/nginx/conf.d/listen_ssl.active;
+  include /etc/nginx/conf.d/listen_plain.active;
   include /etc/nginx/mime.types;
   charset utf-8;
   override_charset on;