update README with instructions for how to create and run tests

README.md

@@ -11,8 +11,12 @@ Since then I've gained a lot of skills both in Minecraft map development and in
 
 ### Setup
 
-1. Configure git to automatically update submodules with `git pull`s by defaulting the `submodule.recurse` flag to `true`:
+#### Testing
 
-```bash
-git config --global submodule.recurse true
-```
+1. Download the [Fabric mod loader](https://fabricmc.net/) and install a new profile to your Minecraft launcher
+2. Download the [Fabric API](https://www.curseforge.com/minecraft/mc-mods/fabric-api/files) jar
+3. Download the latest release jar of [`packtest`](https://github.com/misode/packtest/releases)
+4. Move the `Fabric API` and `packtest` jars into your `mods` folder in the Minecraft directory (typically `%appdata%/.minecraft/mods`)
+5. Run the new profile in your Minecraft launcher to launch a (lightly) modded instance that's able to run `packtest`'s new commands designed for testing
+   1. Try: `test runall`
+   2. See `packtest`'s [README](https://github.com/misode/packtest) for full command documentation