How To Configure Nginx as a Web Server and Reverse Proxy for Apache on One Ubuntu 16.04 Server | DigitalOcean https://www.digitalocean.com/community/tutorials/how-to-configure-nginx-as-a-web-server-and-reverse-proxy-for-apache-on-one-ubuntu-16-04-server#step-6-—-installing-and-configuring-nginx
How to configure HTTP Strict Transport Security (HSTS) on Apache & NGINX | IT Igloo https://itigloo.com/security/how-to-configure-http-strict-transport-security-hsts-on-apache-nginx/