AWS Batch Cloud Custodian Docker Starter Pack

I recently implemented a series of AWS Batch jobs for a client. While most of these were for implementing, well, batch jobs, in the form of reporting functions, I decided to give a go to deploying Cloud Custodian using the same framework, as it basically involved creating an additional CloudFormation nested stack, building Custodian policies and baking them into a container to deploy through Batch. Getting everyhting up and going was a fair bit of work, so I wanted to encapsulate my learnings into something else others could use.