Analyzing the Ionic AWS Full-Stack Starter: Configuration and Providers

As you may already know, AWS and Ionic recently teamed up to create a full-stack project. Both companies are dominating their field with free and polished technologies.
Let’s see what’s the result when two tech superpowers ally together! Quite a big project to cover, in this tutorial we start with the configuration and the providers.

https://www.javascripttuts.com/analyzing-the-ionic-aws-full-stack-starter-configuration-and-providers/

I don’t see the file declarations.d.ts when I start a new project.
Is the latest Ionic doesn’t need it anymore or do I have to create it manually?
I am using Ionic CLI 3.9.2