absolute path to preview images

public/index.html

@@ -28,8 +28,8 @@
     <meta property="og:description" content="The Foreign Interference Attribution Tracker (FIAT) is an open-source database capturing allegations of foreign interference in U.S. elections and political processes.">
     <meta property="og:type" content="website">
     <meta property="og:locale" content="en_US">
-    <meta property="og:image" content="images/screenshots/fiat_image.jpg"/>
+    <meta property="og:image" content="https://interference2020.com/images/screenshots/fiat_image.jpg"/>
-    <meta property="og:image:secure_url" content="images/screenshots/fiat_image.jpg"/>
+    <meta property="og:image:secure_url" content="https://interference2020.com/images/screenshots/fiat_image.jpg"/>
   
     <link rel="stylesheet" href="global.css" />
     <link rel="stylesheet" href="build/bundle.css" />