Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -1 +1,12 @@
-Thanks for wanting to help out or improve this scanning tool. Just fork, make your change, and make a PR back to the `main` branch
+# Setup
+Thanks for wanting to help out or improve this scanning tool. Pull the code down and open it in VS 2022. Requires .NET 6 currently. 
+
+# Making changes
+Check out the [good first issues](https://github.com/JMTK/SunshineGameFinder/issues?q=is%3Aissue+is%3Aopen+label%3A"good+first+issue") list if you're unsure on how to start. Just fork the repo, make your change, and make a PR back to the `main` branch here
+
+# Testing
+1. Make a backup of your apps.json file
+2. Clear out your apps array in the apps.json file
+3. Run the tool
+4. Open a Moonlight client
+5. Ensure that Sunshine can launch a game correctly