stacksimplify/aws-devops-github-actions-ecr-argocd3 — reverse-engineered prompt

I want this repo set up so a UI microservice can be shipped to AWS automatically whenever I push code.

Please add a GitHub Actions flow that watches for app changes, builds a Docker image, pushes it to Amazon ECR, and tags it with both latest and the current commit SHA. I also want it to log in to AWS in a secure way using GitHub OIDC, so there are no long lived AWS keys stored in GitHub.

After the image is pushed, update the Helm values file in this repo with the new image tag and commit that change back, so ArgoCD can notice it and deploy the new version to the cluster. Keep the flow GitOps friendly and easy to understand.

If anything is missing, include the needed workflow file, example config values like region, repo name, and role ARN placeholders, plus any small scripts or README updates so I can follow it end to end. You can look up current AWS and GitHub Actions docs online if needed.