wip: added favicon to page

docs/index.html

@@ -7,6 +7,8 @@
   <meta content="ie=edge" http-equiv="X-UA-Compatible"/>
   <link href="https://fonts.googleapis.com/css?family=Ubuntu&display=swap" rel="stylesheet">
   <link href="./main.css" rel="stylesheet">
+  <link rel="icon" type="image/png" href="./assets/favicon-32x32.png" sizes="32x32" />
+  <link rel="icon" type="image/png" href="./assets/favicon-16x16.png" sizes="16x16" />
   <title>Slim Launcher - Fewer distraction, more life</title>
 </head>