We’ll be using Let’s Encrypt in order to obtain and use - in a web server, for example - an SSL certificate for our domain.

Let’s Encrypt is a free, automated, and open certificate authority brought to you by the non-profit Internet Security Research Group (ISRG).

This will be done through certbot. Setting it up is as trivial as cloning the Git repository and running the certbot-auto file. Initial set-up¹ is left as an exercise for the reader.