Adding scrape files for testing

server/tests/fixtures/html/twitter-only.html

@@ -0,0 +1,10 @@
+<!doctype html>
+<html>
+<head>
+  <title>Document Title</title>
+  <meta name="twitter:title" content="Twitter Card Title">
+  <meta name="twitter:description" content="Twitter card description.">
+  <meta name="twitter:image" content="https://cdn.example.com/twitter.png">
+</head>
+<body><p>x</p></body>
+</html>