Add nuxeo Yum repository when building Nuxeo Server Docker image

Since NXP-27578 we do try to install ffmpeg and ccextractor in the docker image but as the nuxeo Yum repository is not configured, yum install doesn't install them and doesn't fail (default behavior).

We need to add the nuxeo.repo configuration to the build stage in order to install these packages.
At the same time, we can add --setopt=skip_missing_names_on_install=False to yum install to make it fail when a dependency is missing.