Add cc-by banner

templates/default.html

@@ -25,9 +25,7 @@
             <a href="https://jaspervdj.be/hakyll/"> built with hakyll</a> -
             <a href="/atom.xml"> Feed</a>
           </p>
-          <p>
-            CC-BY-NC
-          </p>
+	  <a href="https://creativecommons.org/licenses/by-nc/4.0/"><img src="/images/cc-by-nc.svg"></a>
           <p>
               Want to become a better programmer? <a href="https://www.recurse.com/scout/click?t=7fa4273c56d752484c0e30d3fbb0d52a">Join the Recurse Center!</a>
           </p>