add open graph

Author: johngarrett

index.html

@@ -7,8 +7,25 @@
   <meta name="theme-color" content="#000000" />
   <meta name="mobile-web-app-capable" content="yes">
   <meta name="apple-mobile-web-app-status-bar-style" content="black" />
+
   <title>YVML Map</title>
 
+
+  <!-- Open Graph Tags -->
+  <meta property="og:title" content="YVML Interactive Map" />
+  <meta property="og:description" content="An interactive map for the YVML site" />
+  <meta property="og:image" content="https://gh.yvml.org/map/images/open-graph/open-graph-4.jpg" />
+  <meta property="og:url" content="https://gh.yvml.org/map" />
+  <meta property="og:type" content="website" />
+  <meta property="og:site_name" content="YVML" />
+
+
+  <!-- Twitter tags -->
+  <meta name="twitter:card" content="summary_large_image" />
+  <meta name="twitter:title" content="YVML Interactive Map" />
+  <meta name="twitter:description" content="An interactive map for the YVML site" />
+  <meta name="twitter:image" content="https://gh.yvml.org/map/images/open-graph/open-graph-4.jpg" />
+
   <link rel="stylesheet" href="https://unpkg.com/leaflet/dist/leaflet.css" />
 </head>