一些关于 nginx 配置以及安全头的链接，值得参考，可以保障我们系统的安全
参考资料
https://geekflare.com/tools/tests/rj6uevqzw
https://github.com/GetPageSpeed/ngx_security_headers
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy
https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP
https://developer.mozilla.org/en-US/docs/Web/HTTP/Cookies#Secure_and_HttpOnly_cookies
https://securityheaders.com/
https://github.com/trimstray/nginx-admins-handbook#books
https://github.com/denji/nginx-tuning
https://github.com/yandex/gixy
