[feat] - Add Flux lab to demonstrate CI + Flux Image automation controller for image patching

[ybezsonov]

Outline the high level topic of the lab

The purpose of the lab is to show how to make a change in the source code of one of the a retail sample components, build a new container images and deploy this images to the EKS cluster automatically. This could describe a simple developer workflow from the source to deployed image.

Provide the flow of the lab exercise, including what sample application components will be used

• clone source code of one of the a retail sample components (ui?) to the Cloud9 environment
• clone empty AWS Codecommit repository created during workshop setup
• copy sources to AWS Codecommit folder
• change sources
• git push to AWS CodeCommit to the main branch
• change in the main branch triggers AWS Codepipeline
• AWS Codepipeline starts AWS Codebuild to build an image
• AWS Codebuild builds and image and pushes it to private Amazon ECR
• Flux Image automation controller detect new image and update deployment manifest with new image tag
• Flux reconcile the app and deploy new image
• the learner can test new image

What additional AWS infrastructure or EKS addons/components will need to be created or installed to support this lab?

• AWS Codecommit repository for source code of a retail sample component
• AWS Codepipeline
• AWS CodeBuild to build a new image
• private Amazon ECR to store a new image
• Flux Image automation controller

What additional software or configuration will be required in the Cloud9 IDE?

none

Are enhancements to the retail sample application required to support this lab exercise?

none

[niallthomson]

Implemented in #642