add buildit demo for ecs sam dice app

[jldeen]

Description

Checklist

Please make sure you've completed the relevant tasks for this PR, out of the following list:

• [x] Understand the repository structure
• [x] Add yourself as an author
• [x] Add your pattern
• [x] Add a great SVG diagram for your pattern
• [x] Read our general contribution guidelines
• [x] Read our code of conduct
• [x] Confirm your pattern frontmatter lints correctly. i.e. run npm install && npm run lint locally from your dev environment

[containers-aws-bot]

container-patterns PR Release triggered by aws-samples

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Commit ref: add-buildit-sam-ecs Commit sha: b9c56731db64a6bc0bab4310ed7ed570df6f0168

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[containers-aws-bot]

📄 PR has been closed.

✅ The Amplify preview environment has been removed. ✅ Working branch has been deleted according to policy.