One of my previous blog posts covered how to build a Serverless backend for Slack using by using Lambda Function URL as a webhook. Since I wanted to focus on the application itself, the infrastructure setup part was simplified - using AWS CLI, the function was packaged as a zip file, configured and finally, a Function URL was created along with the required permissions.
In this blog, you will end up deploying the same solution, but this time using IaaC (Infrastructure-as-code) with AWS Cloud Development Kit (CDK) which is a framework for defining cloud infrastructure in code and provisioning it through AWS CloudFormation. You can choose from a list of supported programming languages (at the time of writing - TypeScript, JavaScript, Python, Java, C#/.Net, and Go (in developer preview)) to define your infrastructure components as code, just like you would with any other application!