JSFiddle - React, Tailwind, and code Playground

CSS

html {
    min-width:100%;
    min-height:100%
}
html:after {
    content : "";
    display: block;
    position: fixed;
    top: 0;
    left: 0;
    background-image: url(http://dummyimage.com/1000x1000/000/fff.png); 
    width: 100%;
    height: 100%;
    opacity : 0.2;
    z-index: -1;
}