Discourse is a modern, open-source discussion and forum system. This article describes how to set up Discourse with a free SSL Certificate from Let's Encrypt on Ubuntu 20.04. Before you begin with the Discourse installation: * [Deploy](https://my.vultr.com) a new Ubuntu 20.04 cloud server with at least 2 GB of RAM. * Set up an SMTP server for Discourse emails. You can register for a transactional email account from external email providers such as Mailgun or Sendgrid. Discourse has a [list of re......