Add favicon

assets/boot.html

@@ -7,6 +7,8 @@
 <link rel="stylesheet" href="css/bootstrap.min.css">
 <link rel="stylesheet" href="css/app.css">
 <meta name="theme-color" content="#1a202c">
+<link rel="icon" href="icons/favicon.ico" sizes="16x16 32x32 48x48">
+<link rel="icon" href="icons/favicon.svg" type="image/svg+xml">
 </head>
 <body class="bg-body-tertiary">