JSFiddle - React, Tailwind, and code Playground

HTML

<div class="bg"><img src="http://lamininbeauty.co.za/images/massage2.jpg"></div>

CSS

div.bg {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    text-align: center;
}
div.bg img {
    height: 100%;
}