[Feature] - Secrets chapter using AWS Secrets Manager and SSM Parameter Store

[adamjkeller]

Create a chapter that walks through:

• Explain problem statement, and talk about some of the good practices when referencing secrets in containers.
• Creating secrets in SSM/Secrets Manager
• Show native integration in task definition to reference those secrets using the secrets directive.
• Copilot and CDK tabs
• Will need to have some sort of app that shows what that looks like. Can be as simple as a webapp that shows environment variables (similar to what i did in this blog post, or an app that talks to a backend database (aurora serverless, something that is extremely low to no cost for the temporary demo)

[adamjkeller]

@mptaws

[davivcgarcia]

I was digging into this topic specifically on copilot and SSM/Secrets Manager integrations, but looks like that feature is not available yet (see aws/copilot-cli#1689). I raised a discussion there to see the recommended way of doing that with copilot.