Add developer onboarding section to repository README

[nanaf6203-bit]

Document new developer setup steps in the README.

Acceptance Criteria:

• README includes setup, env vars, and migration steps.
• Platform requirements and common commands are listed.
• Troubleshooting tips are included.
• Doc is easy to follow for a fresh checkout.

[NEA-DEV-coder]

@NEA-DEV-coder has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I would like to work on this issue

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[Valreb001]

@Valreb001 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Good day, I can work this issue, please assign me

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[Swayymalcolm99]

@Swayymalcolm99 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hello maintainer, can I please work on this?

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[code-0-stella]

@code-0-stella has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi,

I would like to work on this issue and deliver a clean, tested solution that meets the acceptance criteria.

Please assign me.

Thank you.

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[ummarig]

@ummarig has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

As a full stack developer with years of experience assigning this task to me will amount to the job done

ℹ️ Repo Maintainers: To accept this application, review their application or assign @ummarig to this issue.

[drips-wave]

Congratulations, @ummarig! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @ummarig: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

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