You should explore the contents of this project. It demonstrates a CDK app with an instance of a stack (HelloServerlessWorldStack)
which contains an Amazon SQS queue that is subscribed to an Amazon SNS topic.
The cdk.json file tells the CDK Toolkit how to execute your app. The build step is not required when using JavaScript.
npm run testperform the jest unit testscdk deploydeploy this stack to your default AWS account/regioncdk diffcompare deployed stack with current statecdk synthemits the synthesized CloudFormation template