Add favicon link tag

index.html

@@ -8,6 +8,7 @@
 <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">
 <meta name="theme-color" content="#0a0520">
 <title>PokéAzure — Study for Azure Certifications</title>
+<link rel="icon" type="image/x-icon" href="favicon.ico">
 <link rel="stylesheet" href="style.css">
 </head>
 <body>