Nginx
Some useful links to explain the concepts of NGinx
Concepts
Configuration
https://geekflare.com/nginx-webserver-security-hardening-guide/
https://www.godaddy.com/garage/tech/config/how-to-install-and-configure-nginx-on-fedora/
Nginx with HTTPS using SSL via LetsEncrypt
Visual Editor for NGinx Config
Tuning & Hardening
http://linuxbsdos.com/2015/02/17/how-to-reduce-php-fpm-php5-fpm-ram-usage-by-about-50/
https://www.nginx.com/blog/10-tips-for-10x-application-performance/
http://www.cyberciti.biz/faq/rhel-centos-fedora-keepalived-lvs-cluster-configuration/
https://www.fissionblue.com/blog/mask-domain-entire-site-using-nginx-ssl/
https://www.digitalocean.com/community/tutorials/apache-vs-nginx-practical-considerations
https://www.digitalocean.com/community/tutorials/how-to-optimize-nginx-configuration