Error docker-compose cant find yml file

Hi, I’m installing Xibo in a new Ubuntu 18.04 (because with 16.04 we have a lot of problems and errors with dependencies) VM, I followed this guide

but when I try to start Xibo with docker-compose up -d (at the xibo directory with docker-compose.yml file and with config.env whith a sql password) I obtain an error that says that docker-compose can’t find any configuration file, I tried with and without sudo…any help? Thanks in advance