JSFiddle - React, Tailwind, and code Playground

HTML

<div id="header">
  <img src="http://www.insomnia.gr/public/style_images/insomnia/background/mountain_2_sheep.png" />
  <img id="logo" src="http://www.insomnia.gr/public/style_images/insomnia/logo.png" />
</div>

CSS

#header {
    position: relative;
}

#logo {
    position: absolute;
    left: 50px;
    top: 50px;
}