http://blog.blackninjadojo.com/aws/serverless/2019/02/18/build-package-and-deploy-an-aws-lambda-using-the-ruby-runtime.html#writing-your-first-aws-lambda-function-using-ruby

https://hackernoon.com/build-a-ruby-based-lambda-function-44f3d006fef6

https://aws.amazon.com/blogs/compute/announcing-ruby-support-for-aws-lambda/