JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
  <body>
    <header>
      <h1>Hello!</h1>
      <h3>Welcome!</h3>
    </header>
  </body>

CSS

* {
  margin:0;
  padding:0;
}

body,html {
  height: 100%;
  background: honeydew;
}
header {
  height: 100vh;
  background-image: url(https://s3-us-west-2.amazonaws.com/myBucket/myBG.jpg);
  background-size: cover;
  background-position: center;

}