What docs changes are you proposing?

Source: https://docs.localstack.cloud/aws/tutorials/java-notification-app/

What’s missing

• Intro
• Prerequisites
• Architecture diagram
• Steps
• Testing the application (needs to be standardized as top-level)
• Conclusion

Proposed edits

• Add ## Architecture diagram.
• Promote existing testing under ## Testing the application.
• Add ## Conclusion.

Acceptance criteria

• Matches target format with labeled Testing the application + Conclusion.

Code of Conduct

• I agree to follow this project's Code of Conduct