This article describes how to remove or edit the “Powered by Rocket Chat on User Login Page” and on the user login page for the app.
Want to have your own Slack like online chat hostedon your own server? Here is the process. First spin up a VM with Debian 11. Enable snaps on Debian and install Rocket.Chat Server
Snaps are applications packaged with all their dependencies to run on all popular Linux distributions from a single build. They update automatically and roll back gracefully.