add image to readme

Author: OFFICEnpurcell

README.md

@@ -1,6 +1,8 @@
 # Halloween Soundboard
 A fun Halloween soundboard to use when you want some spooky sound effects!
 
+![Soundboard](./img/soundboard.jpg)
+
 ## Usage
 First visit the page here: https://nikkipurcell.github.io/halloween-sounds/ Then click any of the keyboard keys for the letter that matches the sound you'd like to hear. You can click them as many times as you like.