Add optional navbar / menu bar
diff --git a/templates/menubar.html.example b/templates/menubar.html.example
new file mode 100644
index 0000000..e35532a
--- /dev/null
+++ b/templates/menubar.html.example
@@ -0,0 +1,63 @@
+<style>
+    .btn-primary {
+        background-color: <?php echo $SERVICE_COLOR;
+        ?>;
+        border-color: <?php echo $SERVICE_COLOR;
+        ?>;
+    }
+    
+    .nav,
+    ul .dropdown-menu .fg-primary,
+    .bg-primary,
+    .nav-link {
+        background-color: #2f9c97 !important;
+        color: white;
+    }
+    
+    .nav-link:hover,
+    .nav-link:visited {
+        background-color: #2f9c97 !important;
+        color: white;
+    }
+    
+    .nav-pills a.nav-link.active,
+    a.nav-link:hover,
+    a.nav-link.active:visited {
+        border-radius: 0%;
+        text-decoration: none;
+        background-color: #d5ebea !important;
+        color: <?php echo $SERVICE_COLOR;
+        ?>!important;
+    }
+    
+    a.dropdown-item:hover {
+        text-decoration: none;
+        background: #d5ebea;
+        color: #2f9c97;
+    }
+    
+    a.dropdown-item {
+        color: #d5ebea;
+    }
+</style>
+<nav class="col-12 bold navbar-expand-lg mt-5 ml-5  pl-5 bg-primary" data-bs-theme="dark">
+    <ul class="nav nav-pills justify-content-start fs-4">
+        <li class="nav-item"><a href="https://korpus.cz/icc" class="nav-link">Home</a></li>
+        <li class="nav-item"><a href="#" class="nav-link active" aria-current="page">Sign up</a></li>
+        <li class="nav-item dropdown">
+            <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-bs-toggle="dropdown" aria-expanded="false">
+            Query
+          </a>
+            <ul class="dropdown-menu fg-primary bg-primary fs-4" aria-labelledby="navbarDropdown">
+                <li><a class="dropdown-item" href="https://korap.korpus.cz/">ICC Czech</a></li>
+                <li><a class="dropdown-item" href="//korap.ids-mannheim.de/instance/icc/eng">ICC English</a></li>
+                <li><a class="dropdown-item" href="//korap.ids-mannheim.de/instance/icc/ger">ICC German</a></li>
+                <li><a class="dropdown-item" href="//korap.ids-mannheim.de/instance/icc/nor">ICC Norwegian</a></li>
+                <li>
+                    <hr class="dropdown-divider">
+                </li>
+                <li><a class="dropdown-item" href="#">QL Introduction</a></li>
+            </ul>
+        </li>
+    </ul>
+</nav>
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