Error while upgrading from Xibo 1.8.0 rc-2 to Xibo 1.8.0 stable version

Hi,
I have Xibo1.8.0rc-2 installed on Ubuntu 16.04. While trying to upgrade to Xibo1.8.0 stable version following the instruction found in:
http://xibo.org.uk/manual/en/release_notes_1.8.0-rc3.html#requirements - Changes to Docker

First when I issued: docker-compose up, I got an error that docker was not installed with a command to install docker. I copied that command and installed docker and issued: docker-compose up aagain. This time I got the following message:
Error: In file ‘./docker-compose.yml’ service ‘version’ doesn’t have any configuration options.

Was any reason to create to two topics about the same issue in pretty much the same time?
Error during upgrading from Xibo 1.8.0 rc-2 to Xibo 1.8.0 stable version

I’ll close this one.