add register option in navbar

frontend/src/components/Navbar.css

@@ -31,7 +31,7 @@
 
 .nav-menu {
   display: grid;
-  grid-template-columns: repeat(4, auto);
+  grid-template-columns: repeat(5, auto);
   grid-gap: 10px;
   list-style: none;
   text-align: center;

frontend/src/components/Navbar.js

@@ -68,6 +68,7 @@ function Navbar() {
                 </Link>
               </li>
             ) : (
+              <>
               <li className="nav-item">
                 <Link
                   to="/login"
@@ -77,6 +78,17 @@ function Navbar() {
                   Anmelden
                 </Link>
               </li>
+              <li className="nav-item">
+                <Link
+                  to="/register"
+                  className="nav-links"
+                  onClick={closeMobileMenu}
+                >
+                  Registrieren
+                </Link>
+              </li>
+
+              </>
             )}
             <li>
               <Link