Configuration file samples Need to be revisioned before actual use

Integrate into config later

• https://gist.github.com/plentz/6737338
• https://www.nginx.com/blog/http-strict-transport-security-hsts-and-nginx/
• https://nginx.org/en/docs/http/ngx_http_v2_module.html
• nginx add_header Content-Security-Policy "upgrade-insecure-requests";