FULL PAGE BACKGROUND IMAGE
Run 
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>HTML</title>
<style>
   html, body {
     height: 100%;
   }
   .container {
      background: url("https://s3.ap-south-1.amazonaws.com/s3.studytonight.com/tutorials/uploads/pictures/1626423162-101156.png") no-repeat;
	  background-size: contain;
      height: 100%;  
   }
   
</style>
</head>
<body>
	<div class="container">
	  <h2> Background image</h2>	
	</div>
	
</body>
</html>