AWS Tutorial
Tutorial is here: https://aws.amazon.com/getting-started/hands-on/build-web-app-s3-lambda-api-gateway-dynamodb/
My deployment of hello world is here: https://dev.d1e0ey530g4ht2.amplifyapp.com/
https://kept5vb167.execute-api.us-east-1.amazonaws.com/dev
DB Table's ARN: arn:aws:dynamodb:sa-east-1:121630971643:table/HelloWorldDatabase