Add API Key Rotation Support for JWT RS256 Keys

[RUKAYAT-CODER]

Overview

jwt-keys.pem is committed to the repo (even if only as a sample). Production deployments should use a secret manager, not file-system keys, and should support key rotation without downtime.

Specifications

Tasks:

• Load JWT keys from JWT_PRIVATE_KEY / JWT_PUBLIC_KEY env vars
• Support multiple public keys during rotation period
• Document rotation procedure in docs/\n

Impacted Files:

• BackEnd/src/modules/auth/strategies/jwt.strategy.tsn- BackEnd/.env.examplen

Acceptance Criteria:

• Application reads keys from env vars, not PEM files
• Old tokens remain valid during rotation window

[Killerjunior]

@Killerjunior has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi maintainer, I have read and understood the issue requirements and checked the necessary documentation. I’m confident I can work on this task effectively and deliver a proper solution.

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

[drips-wave]

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

🧑‍💻 @Killerjunior: 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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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@Killerjunior's PR #1834 was approved and merged by @RUKAYAT-CODER.

🏆 @Killerjunior: You earned 40 FoxPoints for this contribution! Your current tier: Builder (1,871 total points). Track your full progress on GrantFox.

👏 Great work, @Killerjunior! Keep contributing to EarnQuestOne.