Enhance README and Document Personal Contributions

[mohanes139-cell]

Summary

This pull request improves the project documentation and highlights my personal contributions:

• Added a "My Contribution" section to README.md.
• Fixed minor setup issues and ensured Flask is installed for smooth execution.
• Verified the application runs successfully with python3 app.py.
• Improved clarity of setup instructions for new contributors.

Purpose

As an aspiring software developer, the goal of this PR is to contribute meaningful improvements to the project documentation and ensure that future contributors can set up and run the project easily.

This demonstrates my understanding of code documentation, environment setup, and collaborative development practices.

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