Docker IP Conflict with Xibo Installation on Network


I have installed Xibo using a Docker package. I need to use my server on a network that contains an VLAN with IP range 172.20.57/23. I need machines on the network to access the server Xibo which is on the network.

Unfortunately, somewhere in the Docker configuration, IPs starting with 172.20 are being used. How can I overcome this problem?

Any help you can provide would be greatly appreciated.
I am not very familiar with Docker and Linux (Ubuntu server), Thank you in advance for your assistance.

P.S. My native language is French.