Remove ruby dependency from website build

docs/templates/shared/_navbar.html.j2

@@ -0,0 +1,27 @@
+    <div class="navbar navbar-default navbar-fixed-top" role="navigation">
+      <div class="container">
+        <div class="navbar-header">
+          <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#nav-collapse">
+            <span class="sr-only">Toggle navigation</span>
+            <span class="icon-bar"></span>
+            <span class="icon-bar"></span>
+            <span class="icon-bar"></span>
+          </button>
+          <a class="navbar-brand" href="{{root}}/">jq</a>
+        </div>
+
+        <div class="navbar-collapse collapse" id="nav-collapse">
+          <ul class="nav navbar-nav">
+            {% for item in navigation %}
+              <li {% if item == permalink %} class="active" {% endif %}>
+                <a href="{{root}}/{{item}}">{{item | capitalize}}</a>
+              </li>
+            {% endfor %}
+            <li><a href="https://github.com/stedolan/jq/issues">Issues</a></li>
+            <li><a href="https://github.com/stedolan/jq">Source</a></li>
+            <li><a href="https://jqplay.org">Try online!</a></li>
+            <li><a href="https://raw.githubusercontent.com/stedolan/jq/master/NEWS">News</a></li>
+          </ul>
+        </div>
+      </div>
+    </div>