This commit introduces two meta tags to strengthen the application's
security posture and enhance user privacy, following best practices and
OWASP recommendations.
- Add Content-Security-Policy (CSP) to strictly to strictly control
which resources the application is allowed, mitigating the risk of
code injection attacks such as Cross-Site Scripting (XSS).
- Add `referrer` meta tag to prevent the users' browser from sending the
page's address, or referrer, when navigating to another site, thereby
enhancing user privacy.