In this quick lesson we're going to clear out the SQS Queue and SNS Topic that was created for us when we created a CDK app with
cdk init in order for us to be able to start building our app from scratch.
I think you need to do "npm run-script build" before doing the diff.
If someone happens to get the error
Error: This stack uses assets, so the toolkit stack must be deployed to the environment (Run "cdk bootstrap aws://unknown-account/unknown-region"), then check what aws profile is currently used (find in in ~/.aws/credentials), then do the bootstrap with the command
cdk bootstrap --profile profile-name before running