Update User Guide

Author: natanfelles

guide/index.rst

@@ -7,6 +7,8 @@ Framework
 Aplus Framework.
 
 - `Installation`_
+- `About`_
+- `Conclusion`_
 
 Installation
 ------------
@@ -16,3 +18,38 @@ The installation of this package can be done with Composer:
 .. code-block::
 
     composer require aplus/framework
+
+About
+-----
+
+This package is responsible for installing other Aplus Framework libraries.
+
+It has the **Aplus** class, through which it is possible to get information
+about the current version of the installed framework:
+
+.. code-block:: php
+
+    echo Aplus::VERSION;
+    echo Aplus::CODENAME;
+    echo Aplus::DESCRIPTION;
+
+With this package it is possible to create applications according to the need of
+the developer.
+
+As examples, you can analyze the `App <https://docs.aplus-framework.com/guides/projects/app/index.html>`_
+and `One <https://docs.aplus-framework.com/guides/projects/one/index.html>`_
+projects, which create structures using the `MVC <https://docs.aplus-framework.com/guides/libraries/mvc/index.html>`_
+library.
+
+Conclusion
+----------
+
+Aplus Framework is an easy-to-use tool for, beginners and experienced, PHP developers. 
+It is perfect for creating high-performance applications of any size. 
+The more you use it, the more you will learn.
+
+.. note::
+    Did you find something wrong? 
+    Be sure to let us know about it with an
+    `issue <https://gitlab.com/aplus-framework/framework/-/issues>`_. 
+    Thank you!