/lib/systemd/system/rocketchat.service
) using sudo and your favourite text editor, and change the ROOT_URL environmental variable to reflect the URL you want to use for accessing the server (optionally change MONGO_URL, MONGO_OPLOG_URL and PORT):http://your-host-name.com-as-accessed-from-internet:3000
), follow the configuration steps to set an admin account and your organization and server info.