Bad repo link inside container

failure: repodata/repomd.xml from SOGo: [Errno 256] No more mirrors to try.
https://packages.inverse.ca/SOGo/nightly/4/rhel/7/x86_64/repodata/repomd.xml: [Errno 14] HTTPS Error 404 - Not Found


+ Why we have no info in docs about additional opening ports. #55