added main preview

- signed-off-by: trimstray <trimstray@gmail.com>

README.md

@@ -1,9 +1,18 @@
-<h2 align="center"><code>Linux Hardening and Security Guidance</code></h2>
+<h2 align="center"><code>The Practical Linux Hardening Guide</code></h2>
 
 <br>
 
 <p align="center">
-  <a href="https://github.com/trimstray/linux-hardening-and-security-guidance/tree/master">
+    <img src="https://github.com/trimstray/the-practical-linux-hardening-guide/blob/master/doc/img/main_preview.jpg"
+        alt="Master">
+</p>
+
+<br>
+
+<p align="center">"<i>Did you know all your doors were locked?</i>" - Riddick (The Chronicles of Riddick)</p>
+
+<p align="center">
+  <a href="https://github.com/trimstray/the-practical-linux-hardening-guide/tree/master">
     <img src="https://img.shields.io/badge/Branch-master-green.svg?longCache=true"
         alt="Branch">
   </a>
@@ -16,7 +25,7 @@
 <div align="center">
   <sub>Created by
   <a href="https://twitter.com/trimstray">trimstray</a> and
-  <a href="https://github.com/trimstray/linux-hardening-and-security-guidance/graphs/contributors">
+  <a href="https://github.com/trimstray/the-practical-linux-hardening-guide/graphs/contributors">
     contributors
   </a>
 </div>
@@ -25,6 +34,4 @@
 
 ****
 
-## Table Of Content
+Work in progress, just a moment...
-
-****