How to install nxfilter and pihole with docker

Good afternoon,

I was playing around with Guacamole and ran into problems trying to deploy nethserver-docker on a fresh NS demo. Installng the nethserver-docker via yum install --enablerepo=nethforge-testing nethserver-docker resulted in the following error:

Summary

[root@nethdemo ~]# yum install --enablerepo=nethforge-testing nethserver-docker
Loaded plugins: changelog, fastestmirror, nethserver_events
Loading mirror speeds from cached hostfile

I also noted that yum install of https://mrmarkuz.goip.de/mirror/mrmarkuz/7/noarch/nethserver-docker-0.0.0-1.7.gaaa415f.ns7.noarch.rpm results in a failed connection. Am i missing something?