Add Security Headers

[omdxp]

Is your feature request related to a problem? Please describe.
Our HTTP server currently lacks essential security headers, resulting in a poor "D" security score on https://securityheaders.com/?q=dzcode.io&followRedirects=on

Describe the solution you'd like
Integrate the necessary security headers to achieve a higher score, aiming for an "A" or even "A+." The recommended headers to add include:

• X-Frame-Options
• X-XSS-Protection
• X-Content-Type-Options
• Referrer-Policy
• Content-Security-Policy
• Strict-Transport-Security
• Permissions-Policy