docs: add note about nuxt 3 compatibility (#204)

Author: Intevel

Diff for: docs/pages/en/1.index.md

@@ -3,6 +3,11 @@ title: Introduction
 description: 'HTTP module for Nuxt.js provides a universal way to make HTTP requests to the API backend.'
 ---
 
+:::alert{type="warning"}
+HTTP module supports Nuxt 2. Nuxt 3 users can use the new isomorphic [$fetch API](https://v3.nuxtjs.org/docs/usage/data-fetching/#usefetch) ([migration guide](https://v3.nuxtjs.org/docs/migration/component-options#isomorphic-fetch)).
+:::
+
+
 <img src="/preview.png" class="transition-shadow duration-200 rounded-md shadow light-img hover:shadow-lg" />
 
 <img src="/preview-dark.png" class="transition-shadow duration-200 rounded-md shadow dark-img hover:shadow-lg" />