docs: adds playground information

Author: timbru31

README.md

@@ -16,6 +16,11 @@ npm start
 
 If you have suggestions for how sad-creeper could be improved, or want to report a bug, open an issue! We'd love all and any contributions.
 
+
+## Testing
+
+Feel free to use this repository for testing the bot: https://github.com/timbru31/sad-creeper-dev
+
 ---
 
 Built by (c) Tim Brust and contributors. Released under the MIT license.