add site icon html code example
Example 1: favicon in html document
<link rel="shortcut icon" type="image/png" href="http://example.com/favicon.png"/>
Example 2: set icon for html page tab
<link rel="icon" href="http://example.com/favicon.png">
<link rel="shortcut icon" type="image/png" href="http://example.com/favicon.png"/>
<link rel="icon" href="http://example.com/favicon.png">