Replace 'page' twig template for controller/url I have a page generated with custom controller. 
It's special page, so i need to remove all sidebars, headers and logo, for that page, and use custom design/layout.

How can i replace 'page' twig template for that url/controller?
Just create new twig template in the template folder of your theme page--your-url.html.twig and clear the cache.