Add reference to netcup

src/App.vue

@@ -13,11 +13,18 @@
 
     <footer>
       <hr>
+      <div>
         <span>
           Developed by <a href="https://webschneider.org">webschneider.org</a>
           &copy; {{ new Date().getFullYear() }}
         </span>
         <span><a href="https://webschneider.org/impress">Impressum</a></span>
+      </div>
+      <div>
+        <span>
+          <a href="https://www.netcup.de" target="_blank"><img src="/static/netcup-setA-234x60.png" width="234" height="60" alt="netcup.de" /></a>
+        </span>
+      </div>
     </footer>
   </div>
 </template>
@@ -103,6 +110,10 @@ export default {
 footer{
   margin: 1em 0;
 }
+footer > div {
+  margin: 0.5em;
+}
+
 nav>a{
   margin: 0.3em;
   wrap: no-wrap;