# 1. download apt-list file:
sudo wget -O /etc/apt/sources.list.d/bugzz.list https://repo.bugzz.by/public/debian/bugzz.list

# 2. download gpg file:
sudo wget -O /usr/share/keyrings/bugzz.gpg https://repo.bugzz.by/public/debian/bugzz.gpg

# 3. check repo:
sudo apt update