chg: Make icon on capture page a link to index

Related: #117

website/web/templates/capture.html

@@ -4,8 +4,10 @@
 {% block content %}
 <div class="container">
   <center>
+    <a href="{{ url_for('index') }}" title="Go back to index">
       <img src="{{ url_for('static', filename='lookyloo.jpeg') }}"
            alt="Lookyloo" width="400">
+    </a>
   </center>
   </br>
   <form role="form" action="{{ url_for('capture_web') }}" method=post enctype=multipart/form-data>