Matrix
From Jon's Wiki
The IRC of the future!
Installing for a domain
Create a 'matrix' subdomain A record for the domain, e.g. matrix.example.com then add a .well-known to https://example.com/.well-known/matrix/server that returns MIME type application/json with the following:
{ "m.server": "matrix.example.com:443" }
Create a user and empty database on PostgreSQL.
sudo apt install -y lsb-release wget apt-transport-https sudo wget -O /usr/share/keyrings/matrix-org-archive-keyring.gpg https://packages.matrix.org/debian/matrix-org-archive-keyring.gpg echo "deb [signed-by=/usr/share/keyrings/matrix-org-archive-keyring.gpg] https://packages.matrix.org/debian/ $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/matrix-org.list sudo apt update sudo apt install matrix-synapse-py3
Edit /etc/matrix-synapse/homeserver.yaml for database details.