added open graph info

Author: rise-erpelding

public/FarmPicks-Banner.png

@@ -12,7 +12,12 @@
   <meta name="theme-color" content="#000000">
   <meta name="viewport" content="width=device-width, initial-scale=1" />
   <meta name="description" content="Get and contribute information about local farms" />
-
+  <meta property="og:title" content="FarmPicks">
+  <meta property="og:url" content="%PUBLIC_URL%">
+  <meta property="og:image" content="%PUBLIC_URL%/FarmPicks-Banner.png">
+  <meta property="og:type" content="image/png">
+  <meta property="og:image:width" content="1200">
+  <meta property="og:image:height" content="630">
   <title>FarmPicks</title>
 </head>