Hi @ahalilov,
While it might be technically possible (you can create controllers that output HTML over JSON) , I don’t think that you should want that. If you want your data to be intertwined with your HTML – like you’d have to do with PHP for instance – there are better CMS systems out there. Are you familiar with javascript frameworks as React, Vue, Angular, Svelte or other modern frameworks? These all create a static HTML+CSS+JS project, and get their data from API endpoints.
If you don’t want to use javascript for instance on your front-end, it could be possible to generate HTML pages with data from the CMS. But I don’t think that it should be integrated within Strapi.