You no longer need to worry about running your apis on servers and handling auto-scaling. And specially pay for servers when you are not using them.
Run your apis on AWS via Lambda and API Gateway and Lambda will handle auto-scaling and bill you only when the service is used.
I'll be using serverless framework which is a leading nodejs framework to build apis to be deployed in AWS Lambda with API Gateway. It follows the microservices pattern and nicely streamline development and deployment.
***Contact me in advance to discuss about your project specifications
AWS Lambda functions with nodejs and serverless framework