adding a 404

Author: niden

404.html

@@ -0,0 +1,19 @@
+{% extends "main.html" %}
+
+<!-- Content -->
+{% block content %}
+
+## 404
+
+Ooops! Something went wrong.
+
+You can use the Search top right, or you can always create an issue in the
+[docs](https://github.com/phalcon/docs-app) repository, and we will address
+the issue as soon as we can.
+
+<p>
+    <a href="/" class="green-button">Back To Home</a>
+</p>
+
+<3 Phalcon Team
+{% endblock %}