Is there a program for displaying messages and alerts on the terminal?

Question

PHP

Tell me if there is such a program for solving the problem: It is
necessary to send information from the PC of users (it is desirable that html formatting be available) to a common PC (to be displayed on the monitor). Actually, it's just a bulletin board, but I also want to attach alerts from sharepoint to it (the status of something has changed, an alert has appeared). And so that alerts and announcements can be sent, for example, from a small jaber, something like this.