[Backend] Add Security Headers for All HTTP Responses

[ayomideadeniran]

🚀 Feature Overview

Add security headers (CSP, XSS protection, HSTS, etc.) for web security with proper configuration.

This is an essential, MVP-critical feature designed to protect against common web attacks.

🛠️ Implementation Requirements

• Build security headers system.
• Include comprehensive unit tests with coverage >90%.
• Add thorough documentation and educational comments.
• Integrate with existing security infrastructure.

🔧 Technical Specifications

• Built with Node.js and Express.
• Use helmet middleware.
• Configure proper security headers.
• Follow security best practices.

✅ Acceptance Criteria

• Security headers are present and correct.
• Configuration works as expected.
• All unit tests pass with full coverage.
• Documentation is complete and educational.

🎓 Difficulty Level

Beginner - Requires understanding of security headers and Node.js development.

⏱️ Timeline

ETA: 1 day

[aabxtract]

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

I would love to work on this issue, I’ll deliver soonest

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

[ObaniIsola]

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

Hiii, Good Morning Ser, I love your product, and I would love to solve this issue and solve it accurately.

Thank you for granting my request.

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