added github link

Author: Kimmo Virtanen

polls/static/polls/css/app.css

@@ -1065,6 +1065,24 @@ td {
   color: #9d3c17;
 }
 
+.site-footer {
+  padding: 0 1rem 1rem;
+  text-align: center;
+  font-size: 0.92rem;
+  color: var(--ink-soft);
+}
+
+.site-footer a {
+  color: var(--accent-strong);
+  text-decoration: underline;
+  text-underline-offset: 0.12em;
+}
+
+.site-footer a:hover,
+.site-footer a:focus-visible {
+  color: var(--accent);
+}
+
 .dialog-backdrop {
   position: fixed;
   inset: 0;

polls/templates/polls/index.html

@@ -893,5 +893,10 @@ <h2 id="auth-title">[[ t('login') ]]</h2>
       </form>
     </section>
   </main>
+  <footer class="site-footer">
+    <a href="https://github.com/Wikimedia-Suomi/TimePoll" target="_blank" rel="noopener noreferrer">
+      GitHub: Wikimedia-Suomi/TimePoll
+    </a>
+  </footer>
 </body>
 </html>