Scaffold AWS CDK project

[danielnaab]

In order to support our partner deployment in an AWS environment where CloudFormation is preferred, we need a parameterized CloudFormation template that manages all resources for the platform in a manner consistent with the partner's environment. The template should be written in a general-purpose manner that can be iterated on if we encounter this requirement in the future.

Acceptance criteria

• An AWS CDK project is created in infra/aws-cdk. Its build script produces a CloudFormation template.
• The CloudFormation template is wired to the cdktf environment for team testing purposes
• Use infra/core to maintain consistency with the cdktf deployment (secrets, resource names, etc)
• apps/rest-api is updated to host the Astro application via a lambda function
• infra/aws-cdk is documented in its README from the perspective of a partnering agency's devops

[wesley-dean-gsa]

I can confirm that aws-cdk allows you to use cdk synth to generate a CloudFormation YAML file; cdk synth --json for a JSON version