Dependencies for OnlyOffice document server are Nginx webserver, PostgreSQL database server, Node.js, Redis Server, and RabbitMQ server.

sudo apt install postgresql

Both the username and password are required to be 'onlyoffice'

Create Only Office database within PostgreSQL (Not MySQL):

sudo -i -u postgres psql -c "CREATE DATABASE onlyoffice;"

Create the OnlyOffice user.

sudo -i -u postgres psql -c "CREATE USER onlyoffice WITH password 'onlyoffice';"

Grant Permissions for the user on the OnlyOffice database:

sudo -i -u postgres psql -c "GRANT ALL privileges ON DATABASE onlyoffice TO onlyoffice;"