public/index.html

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
  <meta name="theme-color" content="#000000">
  <!--
      manifest.json provides metadata used when your web app is added to the
      homescreen on Android. See https://developers.google.com/web/fundamentals/engage-and-retain/web-app-manifest/
    -->
  <link rel="manifest" href="%PUBLIC_URL%/manifest.json">
  <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico?v=3">
  <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,500">
  <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
  <!--
      Notice the use of %PUBLIC_URL% in the tags above.
      It will be replaced with the URL of the `public` folder during the build.
      Only files inside the `public` folder can be referenced from the HTML.

      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
      work correctly both with client-side routing and a non-root public URL.
      Learn how to configure a non-root public URL by running `npm run build`.
    -->
  <title>Mob Timer</title>

  <style>
    html,
    body,
    #root {
      position: relative;
      height: 100%;
      width: 100%;
      overflow: hidden;
    }

  </style>
</head>

<body>
  <noscript>
    You need to enable JavaScript to run this app.
  </noscript>

  <div id="root"></div>
</body>

</html>