docs: update README and LAB with EC2 support details

[gamaware]

Update docs to reflect EC2 CloudFormation support, remove Presentation section, add EC2 troubleshooting.

Summary by CodeRabbit

• Documentation
  • Added EC2 and AWS Academy deployment path alongside existing Docker setup
  • Introduced CloudFormation-based infrastructure instructions
  • Updated Quick Start guide to include EC2 deployment steps
  • Expanded troubleshooting section with EC2-specific failure scenarios
  • Removed standalone presentation section reference

[coderabbitai]

Caution

Review failed

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Run ID: 6ae8535d-bacd-43e5-8870-382e01e30382

📥 Commits

Reviewing files that changed from the base of the PR and between 88028b1 and 9aa6e49.

📒 Files selected for processing (2)

• 10-databases/README.md
• 10-databases/visualizer/LAB-VISUALIZER.md

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📝 Walkthrough

Walkthrough

This pull request updates project documentation to support AWS EC2 deployment via CloudFormation alongside the existing local Docker setup. Changes include EC2-specific instructions, CloudFormation stack references, and expanded troubleshooting guidance for both local and cloud environments.

Changes

Cohort / File(s)	Summary
Documentation Updates 10-databases/README.md, 10-databases/visualizer/LAB-VISUALIZER.md	Added EC2/AWS Academy CloudFormation deployment instructions alongside existing local Docker setup. Updated Quick Start to reference CloudFormation VisualizerURL output, expanded Troubleshooting with EC2-specific failure modes (initialization delays, Learner Lab prerequisites), added Cleanup steps for CloudFormation stacks, and removed standalone presentation section.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐰 Cloud paths unfold with mighty CloudFormation,
Where EC2 instances dance in AWSellation,
Local Docker flows and remote stacks now aligned,
Documentation blooms—both Earth and Cloud refined!
The troubleshooting garden grows, with care in every line. 🌱

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/readme-ec2-updates

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_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[Copilot]

Pull request overview

Updates Module 10 database lab documentation to reflect the new EC2/CloudFormation deployment option alongside local Docker usage, and removes the presentation-focused section from the module overview.

Changes:

• Document cloudformation.yaml as part of the visualizer lab structure and add EC2-specific guidance for accessing the visualizer.
• Add EC2 cleanup and troubleshooting notes (stack deletion + common EC2 failure modes).
• Remove the “Presentation” section from the module README.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 4 comments.

File	Description
10-databases/visualizer/LAB-VISUALIZER.md	Adds CloudFormation template to the lab structure list, clarifies browser URL for local vs EC2, and expands cleanup/troubleshooting with EC2 notes.
10-databases/README.md	Updates prerequisites/architecture text for EC2 support, adds an EC2 quick start path, expands troubleshooting, and removes the presentation section.

[Copilot]

The troubleshooting row advises waiting 5–10 minutes after CREATE_COMPLETE for Docker setup, but earlier the Quick Start says the stack completes in ~5–10 minutes (and LAB instructions suggest only a short extra wait after completion). Please make the timing guidance consistent to avoid confusion.

Suggested change

	| EC2 page does not load | Stack still initializing | Wait 5-10 min after CREATE_COMPLETE for Docker setup |
	| EC2 page does not load | Stack still initializing | Wait a few minutes after `CREATE_COMPLETE` for Docker setup |

[Copilot]

The Prerequisites list still implies Docker Desktop is required, but the doc now supports an EC2 (browser-only) path. Consider splitting prerequisites by environment (Local vs EC2) or rewording this section so EC2 readers don’t think they need Docker Desktop.

[Copilot]

This section introduces an EC2 quick start, but the README’s Cleanup section below still only shows running ./cleanup.sh (local). To keep the EC2 option reproducible end-to-end, add a brief EC2 cleanup note here (e.g., delete the CloudFormation stack).

Suggested change

	**VisualizerURL** from the Outputs tab.
	**VisualizerURL** from the Outputs tab. When you finish the lab,
	delete the CloudFormation stack to clean up the EC2 deployment.

[Copilot]

The troubleshooting guidance says to wait 5–10 minutes after CREATE_COMPLETE, but earlier in the EC2 setup flow the stack creation itself is estimated at 5–10 minutes and then suggests waiting “another minute” if the page doesn’t load. Please align these so readers don’t get conflicting timing expectations (e.g., “wait a couple minutes after CREATE_COMPLETE” or similar).

Suggested change

	| EC2 page does not load | Stack still initializing | Wait 5-10 min after CREATE_COMPLETE for Docker setup |
	| EC2 page does not load | Stack still initializing | Wait a couple of minutes after CREATE_COMPLETE for Docker setup |