Update README for Hacktoberfest

Author: kylemh

README.md

@@ -3,13 +3,19 @@
   <a href="https://operationcode.org">
     <img
       alt="Operation Code Hacktoberfest Banner"
-      src="https://s3.amazonaws.com/operationcode-assets/branding/logos/large-blue-logo.png"
+      src="https://operation-code-assets.s3.us-east-2.amazonaws.com/operation_code_hacktoberfest_2019.jpg"
     >
   </a>
   <br />
   <br />
 </div>
 
+# 🎃 Hacktoberfest 🎃
+
+[All the details you need](https://github.com/OperationCode/START_HERE/blob/master/README.md#-hacktoberfest-) before participating with us.
+
+<br />
+
 [![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)
 [![Twitter Follow](https://img.shields.io/twitter/follow/operation_code.svg?style=social&label=Follow&style=social)](https://twitter.com/operation_code)
 [![Code-style: black](https://img.shields.io/badge/code%20style-black-000000.svg)](https://github.com/ambv/black)