Add meta tags for social media

index.html

@@ -6,6 +6,11 @@
   <meta charset="UTF-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <title>Feather</title>
+  <meta name="description" content="Simply beautiful open source icons. Each icon is designed on a 24x24 grid with an emphasis on consistency and simplicity.">
+  <meta property="og:title" content="Feather">
+  <meta property="og:type" content="website">
+  <meta property="og:description" content="Simply beautiful open source icons">
+  <meta name="twitter:card" content="summary">
   <link href="https://fonts.googleapis.com/css?family=Rubik:300,400" rel="stylesheet">
   <link rel="stylesheet" href="style.css">
 </head>