Add .env.example with all required variables documented

[dev-fatima-24]

Description

.env.example is referenced in the README but its contents are not defined. New developers cannot onboard without it.

Acceptance Criteria

• .env.example contains all variables from the Environment Variables section
• Each variable has an inline comment explaining its purpose and expected format
• README quick-start references .env.example explicitly
• .env is confirmed in .gitignore

Priority: High | Effort: Small

[devwithsammy]

@devwithsammy has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hi maintainers, I am Samuel, and I am a full-stack developer for 4+ years now. I have also been an active open source contributor, AI enthusiast and even more recently diving into the web3 space with solidity.

I will like to take on this task of setting up a .env.example for all env variables required, as it is something i have done multiple times over the course of being a developer for years now. I really would like to resolve this issue and I hope it is assigned to me

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

[teslims2]

@teslims2 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hi, I'd like to take on this issue. I have hands-on experience with the relevant stack and I'm confident I can deliver a clean, well-tested solution. I'll have an initial implementation ready for review within a few days. Happy to discuss the approach before I get started if that's helpful.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @teslims2 to this issue.

[drips-wave]

Congratulations, @teslims2! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on April 29, 2026.

🧑‍💻 @teslims2: 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

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊

[Xaxxoo]

@Xaxxoo has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hi, can I solve this issue please ?

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

[drips-wave]

Congratulations, @Xaxxoo! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on April 29, 2026.

🧑‍💻 @Xaxxoo: 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

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊