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serverless-application-model
The AWS Serverless Application Model (AWS SAM) transform is a AWS CloudFormation macro that transforms SAM templates into CloudFormation templates.
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If you want to follow the next steps, you need to install the AWS SAM CLI. SAM provides project templates to initialize different kinds of sample serverless applications. I will skip that part, but I encourage you to check the built-in project templates or create your own using Cookiecutter.
To make it easier to package and deploy the Lambda functions and all the necessary resources (e.g.: IAM roles for the functions), I will use a very convenient tool when working with serverless applications: the AWS Serverless Application Model (SAM). SAM uses templates similar to those of AWS CloudFormation, but it takes care of downloading and packaging all your function's dependencies into a .zip file or a Docker container, depending on the package type you choose. Furthermore, if you have runtime-specific dependencies (e.g.: Python packages that use C/C++ extensions), you can easily install a Labmda-compatible package by using Docker locally and the --use-container flag when building the Lambda package. Finally, it uploads the function package or container to Amazon S3 or Amazon ECR, respectively, so you can deploy them using CloudFormation.