Prerequisites
- an up-to-date version of Ubuntu or Debian (tested using Ubuntu 18.04 and Debian Buster)
- a running instance of Apache or Nginx
- OpenJDK
Since writing this guide (in March 2020) it seems like an extensive official guide was created and you might want to follow it instead. (but I still recommend using certbot for SSL instead)
Sources / More Information
github.com/jitsi/jitsi-meet/blob/master/doc/quick-install.md
github.com/jitsi/jitsi-meet/blob/master/doc/manual-install.md