create not_found_page.html

src/server/views/layout-growi/not_found_shared_page.html

@@ -0,0 +1,20 @@
+{% extends 'base/layout.html' %}
+
+
+{% block content_header %}
+{% endblock %}
+{% block content_main_before %}
+{% endblock %}
+{% block search %}
+{% endblock %}
+
+{% block content_main %}
+  <div class="row not-found-message-row mb-4 d-edit-none">
+    <div class="col-md-12">
+      <h2 class="text-muted">
+        <i class="icon-info" aria-hidden="true"></i>
+        Page is not found
+      </h2>
+    </div>
+  </div>
+{% endblock %}