appium-desktop/app/renderer/splash.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Appium</title>
    <link rel="stylesheet" href="stylesheets/splash.global.less" />
  </head>
  <body>
    <div id="root">
      <img id="splashImage" src="/images/appium_icon_big.png" />
      <img id="loader" src="/images/loader.svg" />
    </div>
  </body>
</html>