$ sudo apt install gnupg
$ sudo apt install openjdk-11-jre
$ sudo apt install apt-transport-https
$ sudo apt install ufw
$ sudo apt update
$ sudo hostnamectl set-hostname meet.bobbushman.com
$ sudo emacs -nw /etc/hosts
# add 66.23.231.157 meet.bobbushman.com
$ ping meet.bobbushman.com
$ echo deb http://packages.prosody.im/debian $(lsb_release -sc) main | sudo tee -a /etc/apt/sources.list
$ wget https://prosody.im/files/prosody-debian-packages.key -O- | sudo apt-key add -
$ sudo apt update
$ sudo apt install lua5.2
$ curl https://download.jitsi.org/jitsi-key.gpg.key | sudo sh -c 'gpg --dearmor > /usr/share/keyrings/jitsi-keyring.gpg'
$ echo 'deb [signed-by=/usr/share/keyrings/jitsi-keyring.gpg] https://download.jitsi.org stable/' | sudo tee /etc/apt/sources.list.d/jitsi-stable.list > /dev/null
$ sudo ufw allow 80/tcp
$ sudo ufw allow 443/tcp
$ sudo ufw allow 10000/udp
$ sudo ufw allow 22/tcp
$ sudo ufw allow 3478/udp
$ sudo ufw allow 5349/tcp
$ sudo ufw enable
$ sudo ufw status verbose