security: enforce JWT secret minimum entropy

[dotunv]

Problem

config/env.js validates that JWT_SECRET is set but does not enforce minimum length or entropy. A weak or short secret could allow token forgery.

Current Validation

if (!process.env.JWT_SECRET) {
  missing.push('JWT_SECRET');
}

Solution

Add minimum requirements:

if (!process.env.JWT_SECRET) {
  missing.push('JWT_SECRET');
} else if (process.env.JWT_SECRET.length < 32) {
  warnings.push('JWT_SECRET should be at least 32 characters');
}

Also

• Validate STELLAR_NETWORK is one of testnet or mainnet
• Validate PLATFORM_SECRET_KEY starts with S and is the correct length
• Validate PORT is a number if set

[Lanhubs]

@Lanhubs has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I’d love to take this on! I have strong experience implementing these exact patterns and can deliver a clean, production-ready solution that hits all acceptance criteria.

My approach will focus on writing modular, well-documented code with comprehensive test coverage for both success paths and edge cases.

I'm ready to get started immediately. Could you please assign this to me?

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

[drips-wave]

Congratulations, @Lanhubs! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Lanhubs: 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 🌊

[drips-wave]

This issue has been marked as completed by a Drips Wave moderator for @Lanhubs as part of the Stellar Wave Program's 7th Wave 🥳

Moderator's reason: [Auto-assessed] The PR was merged on 2026-07-26 and comprehensively addresses all criteria in Issue #509, including enforcing JWT secret length, validating the Stellar network, checking the platform secret key format, and ensuring the port is a valid integer.

😎 @Lanhubs: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here.

🧑‍💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.

ℹ️ Note: This issue was marked complete via moderation. Points were issued even though the GitHub issue remains open.