docs: add instructions for debugging tests via terminal (#2085)

Co-authored-by: Anjorin Damilare <damilareanjorin1@gmail.com>

Author: joshnuss

docs/guide/debugging.md

@@ -4,6 +4,21 @@ title: Debugging | Guide
 
 # Debugging
 
+## Terminal
+
+To debug a test file without an IDE, you can use [`ndb`](https://github.com/GoogleChromeLabs/ndb). Just add a `debugger` statement anywhere in your code, and then run `ndb`:
+
+```sh
+# install ndb globally
+npm install -g ndb
+
+# alternatively, with yarn
+yarn global add ndb
+
+# run tests with debugger enabled
+ndb npm run test
+```
+
 ## VSCode
 
 To debug a test file in VSCode, create the following launch configuration.