Add link to about page in footer

views/index.html

@@ -26,7 +26,12 @@
 
     <footer>
       <div class="wrapper">
-        <a target="_blank" href="//github.com/lukechilds/tor-explorer">Source code</a> - <a target="_blank" href="//github.com/lukechilds/tor-explorer/issues">Report a bug</a>
+        <a href="/about">About</a>
+        -
+        <a target="_blank" href="//github.com/lukechilds/tor-explorer">Source code</a>
+        -
+        <a target="_blank" href="//github.com/lukechilds/tor-explorer/issues">Report a bug</a>
+
         <span class="me">A thing by <a target="_blank" href="//github.com/lukechilds">@lukechilds</a></span>
       </div>
     </footer>