These are my NGINX configurations. They are written for nginx-core with nginx-mod-stream on Fedora and mainline NGINX on RHEL.

1. On Fedora, install nginx-core, nginx-mod-stream, certbot and policycoreutils-python-utils. On RHEL, install nginx from the mainline repository, certbot, and python3-certbot-nginx. Makesure rsync is available on the OS.
2. On Fedora, comment out the default server block in /etc/nginx/nginx.conf. On RHEL, move /etc/nginx/conf.d/default.conf to /etc/nginx/conf.d/default.conf.bk
3. Run setup.sh
4. Generate a certificate with your hostname with the certbot/default-quic example. Copy etc/nginx/conf.d/default-quic.conf to the corresponding directory on your server and edit it approprieately.
5. Generate certificates with the example in the certbot directory.
6. Make your actual vhost config based on the sites_.* samples in /etc/nginx/conf.d.

This is used on my tunnel servers with multiple IP addresses. Hence, you may see addresses like ipv4_1 and ipv4_2. Just replace them with your own ip addresses.