Xibo 4 with docker logo change not working

I’ve installed Xibo 4 using Docker, but I’m encountering issues changing the logo, even after following the provided instructions. I’ve attached a screenshot indicating the path I created for the logo. Despite this, the changes aren’t taking effect. Can you please assist me with this?

Have you enabled “mytheme” in CMS settings?

i am not getting option there to change CMS and one more question how we can add more text on login page?

same as with the logo → copy the login.twig to the custom folder and edit it eg: theme/custom/MYTHEME/views/