We only have Elixir related threads there now @pillaiindu 
I’ve not heard of AWS Amplify before but it looks like it’s just for the backend of existing apps?
The Amplify Framework provides a set of libraries and UI components and a command line interface to build mobile backends and integrate with your iOS, Android, Web, and React Native apps. The Amplify CLI allows you to configure all the services needed to power your backend through a simple command line interface. The Amplify library makes it easy to integrate your code with your backend using declarative interfaces and simple UI components.
If so and there’s only going to be 200 to 1000 cars, maybe use Rails or Phoenix as an API only app?