Update docs/content/2.guide/2.directory-structure/1.pages.md

Co-authored-by: pooya parsa <pyapar@gmail.com>

docs/content/2.guide/2.directory-structure/1.pages.md

@@ -10,7 +10,7 @@ head.title: "Pages"
 Nuxt provides a file-based routing to create routes within your web application using [Vue Router](https://router.vuejs.org) under the hood.
 
 ::alert{type="info"}
-This directory is **optional**, meaning that [`vue-router`](https://router.vuejs.org) won't be included if you only use [app.vue](/guide/directory-structure/app) (unless you provide an [`router.options.ts`](/guide/directory-structure/pages#router-options), reducing your application's bundle size.
+This directory is **optional**, meaning that [`vue-router`](https://router.vuejs.org) won't be included if you only use [app.vue](/guide/directory-structure/app) (unless you set `pages: true` in `nuxt.config` or have a [`app/router.options.ts`](/guide/directory-structure/pages#router-options)), reducing your application's bundle size.
 ::
 
 ## Usage