JSFiddle - React, Tailwind, and code Playground

HTML

<img id="topBar" src="imgs/topBar.png">
	<div id ="wrapper">
	</div>

CSS

body {
	padding: 0;
	margin: 0;
}
body img:first-child{
	width: 100%;
	height: 5px;
	margin:0;
	display: block;
}
#wrapper {
	width: 100%;
	max-width: 500px;
	height: 100px;
	margin: 0 auto;
	border: 4px solid;
}