Add Support Me section at the end of each post

blog/static/css/main.css

@@ -118,6 +118,10 @@ main img {
   color: #f33;
 }
 
+.post-footer-support, .post-footer-support > h2 {
+  color: #888;
+}
+
 .PageNavigation {
   font-size: 0.9em;
   display: table;

blog/templates/second-edition/page.html

@@ -24,6 +24,11 @@
         </ol>
     </aside>
     {{ page.content | safe }}
+
+    <div class="post-footer-support">
+        <h2>Support Me</h2>
+        <p>In case you liked this post and would like to support me, you can do so on <a href="https://liberapay.com/phil-opp/">liberapay</a> or <a href="https://donorbox.org/phil-opp">donorbox</a>. Thanks!</p>
+    </div>
 {% endblock main %}
 
 {% block after_main %}