apt install -y lsb-release ca-certificates apt-transport-https curl gnupg dpkg
curl https://msg7086.gitlab.io/debian/public.key | gpg --dearmor > /usr/share/keyrings/msg7086-deb.gpg
echo "deb [signed-by=/usr/share/keyrings/msg7086-deb.gpg] http://msg7086.gitlab.io/debian/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/msg7086-deb.list

# or

apt install -y lsb-release ca-certificates apt-transport-https curl gnupg dpkg
curl https://debian.x86.men/public.key | gpg --dearmor > /usr/share/keyrings/msg7086-deb.gpg
echo "deb [signed-by=/usr/share/keyrings/msg7086-deb.gpg] http://debian.x86.men/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/msg7086-deb.list