add footer

public/css/main.css

@@ -88,6 +88,8 @@ nav .container {
 
 #main {
     margin-top: 64px;
+    margin-bottom: 1.6em;
+    flex: 1 1 0;
 }
 
 div.info,
@@ -195,3 +197,27 @@ td.fail {
     -ms-box-sizing: border-box;
     box-sizing: border-box;
 }
+
+footer {
+    background: #363636;
+    color: #EDEDED;
+    flex-shrink: 0;
+    white-space: nowrap;
+    padding: 0 20px;
+    display: flex;
+    justify-content: space-between;
+}
+
+footer div {
+    padding: 15px;
+}
+
+footer .center {
+    text-align: center;
+}
+
+footer a {
+    color: #EDEDED;
+    cursor: pointer;
+    text-decoration: none;
+}

public/index.html

@@ -67,6 +67,14 @@
             </div>
         </div>
     </article>
+    <footer>
+        <div>
+            <a href="https://stustanet.de/impressum">Imprint</a>
+        </div>
+        <div>
+            <a href="https://gitlab.stusta.de/stustanet/connectivity-selftest">Source Code</a>
+        </div>
+    </footer>
     <script src="js/selftest.js"></script>
 </body>
 </html>