Error when Install Xibo on portainer

I am facing a problem when installing. Xibo on Portainer
Attached is a picture showing the error. Please help solve this problem in detail because I am working on this project for study and I do not have sufficient experience, so I am asking for details with pictures or detailed steps.


error is
AH00558: apache2: Could not reliably determine the server’s fully qualified domain name, using 172.31.0.4. Set the ‘ServerName’ directive globally to suppress this message