Linoxide published a tutorial about setting up the Nginx webserver with Let's Encrypt using ACME on Ubuntu 20.04.
How to Setup Nginx with Let's Encrypt using ACME on Ubuntu 20.04
Here we learn how to setup Nginx with Let's Encrypt by using ACME on Ubuntu 20.04. ACME method is an alternative to using the Certbot tool.
How to Setup Nginx with Let's Encrypt using ACME on Ubuntu 20.04