obs-build from OBS:Server:2.8:Staging project

For xUbuntu 14.04 run the following:

Keep in mind that the owner of the key may distribute updates, packages and repositories that your system will trust (more information).

echo 'deb http://download.opensuse.org/repositories/OBS:/Server:/2.8:/Staging/xUbuntu_14.04/ /' | sudo tee /etc/apt/sources.list.d/OBS:Server:2.8:Staging.list
curl -fsSL https://download.opensuse.org/repositories/OBS:Server:2.8:Staging/xUbuntu_14.04/Release.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/OBS_Server_2.8_Staging.gpg > /dev/null
sudo apt update
sudo apt install obs-build