Xibo shows php info page when moved to a custom port

Hello guys, please why does a PHP info page come up once I move xibo to a different port.
I want it running on a different port (Using docker-compose -f cms_custom-ports.yml up -d
), until I figure out how to set the reverse proxy.
Or is this a default behaviour?

I don’t want to have to kill Nginx every time, just it’s Xibo runs on port 80
Thank You.