Added: OpenGraph meta tags

Author: mallowlabs

_layouts/product.html

@@ -5,6 +5,11 @@
     <meta name="description" content="{{page.description | strip_newlines}}">
     <meta name="keywords" content="{{page.keywords | join:','}}">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta property="og:title" content="{{page.title}} | {{ page.subtitle }}">
+    <meta property="og:type" content="article">
+    <meta property="og:description" content="{{page.description | strip_newlines}}">
+    <meta property="og:url" content="{{page.canonical_url}}">
+    <meta property="og:image" content="imgs/ss_all.png">
     <link rel="canonical" href="{{ page.canonical_url }}">
     <link href="./imgs/favicon.ico" rel="shortcut icon" type="image/vnd.microsoft.icon">
     <link rel="stylesheet" href="../styles/bootstrap.css" type="text/css">