Update setup steps for contributing

Author: SSlinky

contributing.md

@@ -4,12 +4,14 @@
 ## Setup
 
 1. Fork this repo
-2. Install Java >= 11
-3. Install NPM
+2. Install [Java](https://www.oracle.com/au/java/technologies/downloads/) >= 11
+3. Install [NPM](https://github.com/coreybutler/nvm-windows)
 4. `npm install` to install dependencies.
 5. `npm run textMate` first time and every time grammar is changed.
 6. `npm run antlr4ng` first time and every time grammar is changed.
+7. Create a `.\sample` directory as a default workspace for client debugging (or update .\\.vscode\\launch.json as preferred).
 7. (Optional) Install [ANTLR4 grammar syntax support](https://marketplace.visualstudio.com/items?itemName=mike-lischke.vscode-antlr4) VSCode extension.
+    Note: to debug a grammar, you'll first need to activate the extension by opening one of the *.g4 files.
 
 To contribute, you'll need to [create a pull request from a fork](https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/proposing-changes-to-your-work-with-pull-requests/creating-a-pull-request-from-a-fork).
 **Signed commits are turned on for this repo.**