Update Java and Node Versions in Readme

[ashifkhn]

Issue Description

This issue involves updating the Java and Node.js versions to the latest stable versions. Additionally, steps to set up the React Native mobile app will be documented for future reference.

Current Behavior

Outdated documentation.

Screenshots

n/a

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Environment

• Operating System: [e.g., Windows, macOS, Linux]
• Browser (if applicable): [e.g., Chrome, Firefox, Safari]
• Version of Software/Project: [e.g., v1.0.0]

Additional Information

[Include any additional context, logs, or details that might be helpful in addressing the issue.]

Checklist

• I have read and followed the project's code of conduct.
• I have searched for similar issues before creating this one.
• I have provided all the necessary information to understand and reproduce the issue.
• I am willing to contribute to the resolution of this issue.

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[ethanernst11]

#451

[Ayushsanjdev]

@ashifkhn looks like this has been taken care of by @ethanernst11 ?