Changed not-found img

- changed private link
- changed to svg

src/main/components/Menu.js

@@ -29,7 +29,7 @@ function Menu() {
                     <nav>
                         <a href="https://letsstein.de/polytopia">Polytopia</a>
                         <a href="https://letsstein.de/civ">Civilization</a>
-                        <a href="http://172.22.2.1:7204">Private</a>
+                        <a href="https://privat.letsstein.de">Private</a>
                     </nav>
                 </div>
             </div>

src/main/components/NotFound.js

@@ -5,7 +5,7 @@
  *      https://svg2jsx.com/
  */
 
-import NotFoundImg from '../images/NotFound.jsx';
+import {ReactComponent as NotFoundImg} from '../images/not-found.svg';
 import './NotFound.css'
 
 function NotFound () {