security: review environment variable management

[Abd-Standard]

Description
Ensure secrets are not exposed.

Acceptance Criteria
.env.example updated
Sensitive values removed
Documentation added

[Ayinkx]

Hi i would like to work on this issue please assign to me
I can do it perfectly

[Ayinkx01]

Hi l would like to take this job

[success-OG]

Hi Repo Maintainer,

I would like to work on this issue.

I have experience with secure environment configuration and secret management, and I’m comfortable auditing projects to ensure sensitive values are not exposed. I can review the current setup, clean up any leaked or hardcoded secrets, update the .env.example file, and add clear documentation for safe usage.

Could you please assign this issue to me?

Thank you!

[grantfox-oss]

🦊 GrantFox — @success-OG has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #36)
2. Your PR will be reviewed by the Core-Foundry maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign | FWC26 campaign!

@success-OG's PR #123 was approved and merged by @Abd-Standard.

🏆 @success-OG: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (118 total points). Track your full progress on GrantFox.

👏 Great work, @success-OG! Keep contributing to Core-Foundry.