@evgeniy-onegin like change the colors displayed in the UI? There are many NodeBB themes you can try. If you want to customize yourself you can use custom CSS in the ACP.
Unsolved nodebb.service: Can't open PID file
I followed the Instruction in this page: https://docs.nodebb.org/configuring/running/ to make nodebb a systemd and it work its just i get an error in systemctl status nodebb that he can not open the pidfil is that a problem?
@yairman I have a suspicion you may be having a "permissions" issue. What are the mode and ownership status of your pid file, eh?