Need "Debugging CDK Apps" section

[Doug-AWS]

Replaces this issue created by Doug-AWS on Apr 1 in the CDK repo: aws/aws-cdk#2153.

Original description: none

[reidca]

I have searched everywhere to see how to do this. I wanted to understand why I was getting an undefined returned for an object and therefore wanted to debug the application. I am a novice at typescript in general but have searched high and low for how to attach a debugger and stop at a breakpoint in VS Code to no avail. Anyone that knows how to do this please create a guide or bullet points to follow, this would be a huge benefit. Thanks.

[alexIsAtGitHub]

Hey @reidca I think you'll need to use aws-sam. That said I have not been able to successfully debug with in my CDK application but running locally (with out debug) is fine. When trying to attach the debugger I continue to get a "Error: Cannot find module 'aws-sdk'" meaning its not looking in my node_modules for some reason.

[alexIsAtGitHub]

this is also related aws/aws-cdk#716