fix missing env var

Author: ThomasKranitsas

config/default.js

@@ -23,7 +23,7 @@ module.exports = {
 
   SUBMITTER_ROLE_ID: process.env.SUBMITTER_ROLE_ID || '732339e7-8e30-49d7-9198-cccf9451e221',
 
-  RESOURCE_ROLES_WITHOUT_TIMELINE_NOTIFICATIONS: process.env.RESOURCE_ROLES_WITHOUT_TIMELINE_NOTIFICATIONS.split(',') || ['2a4dc376-a31c-4d00-b173-13934d89e286'],
+  RESOURCE_ROLES_WITHOUT_TIMELINE_NOTIFICATIONS: process.env.RESOURCE_ROLES_WITHOUT_TIMELINE_NOTIFICATIONS ? process.env.RESOURCE_ROLES_WITHOUT_TIMELINE_NOTIFICATIONS.split(',') : ['2a4dc376-a31c-4d00-b173-13934d89e286'],
 
   IS_CREATE_FORUM: process.env.IS_CREATE_FORUM || true,