Add required environment vars to pods

[jerry-hall]

TODO:

Add environment variables to container:

• REGION
• APIVERSION ("2012-11-05" default)
• SQS_QUEUE_URL

Originally posted by @jerry-hall in #4 (comment)

[jerry-hall]

It seems there are a few ways I could add environment variables to containers. A config map comes to mind, however, it might be too much work for the 3 env vars I have.

This seems like it would be easier if I were deploying to Amazon EKS with terraform as I could set the environment variables in variables.tf. However, I'm pretty set on deploying to EC2 instances for the learning-value of this project.

So... that means I'll have to template values from the command line. Here's an example of how to do this: https://stackoverflow.com/questions/48296082/how-to-set-dynamic-values-with-kubernetes-yaml-file