docs: update README and add new screenshot

Author: abolkog

README.md

@@ -5,14 +5,15 @@
 
 A simple JavaScript playground / code sandbox hooked up with few libraries for quick code testing
 
-![Sample](https://user-images.githubusercontent.com/3861725/75946297-d6600380-5ef0-11ea-9b59-794ae8ec613b.png)
+![Sample](images/js-playground.png)
 
 ## Available Libraries
 
 - [Redux](https://redux.js.org/)
 - [Lodash](https://lodash.com/)
 - [Axios](https://github.com/axios/axios)
 - [Luxon](https://moment.github.io/luxon/#/)
+- [date-fns](https://date-fns.org/)
 
 ## Demo
 

images/js-playground.png

@@ -78,6 +78,24 @@ const About: React.FC = () => {
                   >
                     Khalid Elshafie
                   </a>
+                  <div className="mt-6 flex gap-4 justify-center">
+                    <a
+                      href="https://github.com/abolkog/js-playground/fork"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      className="bg-gray-800 hover:bg-gray-700 text-white font-semibold py-2 px-4 rounded border border-gray-700 transition"
+                    >
+                      Fork on GitHub
+                    </a>
+                    <a
+                      href="https://github.com/abolkog/js-playground"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      className="bg-yellow-500 hover:bg-yellow-400 text-black font-semibold py-2 px-4 rounded transition"
+                    >
+                      Star on GitHub
+                    </a>
+                  </div>
                 </div>
               </div>
             </div>