title: NextJs best practise/where to to set the page to fullscreen
body: <p>Building a NextJS application, the <code>__next div</code>  will only be as high as the elements it contains.<br />
  If I want to add a <code>button</code> to the bottom of a page, the page needs to be &quot;fullscreen&quot;, e.g. <code>height: 100vh</code></p>
  <p>So my question is: Where do I apply that fullscreen style? Inside the <code>_app.js</code>, <code>_document.js</code> or somewhere else?</p>
  <p>I am also using Material UI, in case that changes anything</p>