JSFiddle - React, Tailwind, and code Playground

CSS

* {
    margin:0;
    padding:0;
}
html, body {
    width:100%;
    height:100%;
}
body {
    background-image:url(http://placehold.it/400x300);
    background-size:contain;
    background-repeat:no-repeat;
    background-position:center center;
}