define is user page deletion enabled default value

packages/app/src/server/models/config.ts

@@ -67,6 +67,7 @@ export const defaultCrowiConfigs: { [key: string]: any } = {
   'security:pageRecursiveDeletionAuthority' : undefined,
   'security:pageRecursiveCompleteDeletionAuthority' : undefined,
   'security:disableLinkSharing' : false,
+  'security:isUserPageDeletionEnabled': false,
 
   'security:passport-local:isEnabled' : true,
   'security:passport-ldap:isEnabled' : false,