add screenshot to readme

Author: reedbryan

README.md

@@ -4,6 +4,8 @@ Ghost (also known as ghosts or pig) is a written or spoken word game in which pl
 
 With this app, you can play Ghost against an AI opponent. [Click here to play](https://reedbryan.github.io/ghost-webapp/).
 
+[!Alt text](https://github.com/reedbryan/ghost-webapp/blob/main/data-prep/FrontPageSC.png)
+
 ## Table of Contents
 - [Game Rules](#game-rules)
 - [Word Bank Database](#word-bank)