Twitter card support

frontend/server/card.ejs

@@ -0,0 +1,30 @@
+
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+        <title>wavesurfer.js | Media Element Example</title>
+        <script src="https://unpkg.com/wavesurfer.js"></script>
+        <script src="/card.js"></script>
+    </head>
+
+    <body >
+
+        <div id="demo">
+            <div id="waveform">
+                <!-- Here be the waveform -->
+            </div>
+
+            <div class="controls">
+                <button class="btn btn-primary" data-action="play">
+                    <i class="glyphicon glyphicon-play"></i>
+                    Play
+                    /
+                    <i class="glyphicon glyphicon-pause"></i>
+                    Pause
+                </button>
+            </div>
+        </div>
+    </body>
+</html>
+