sudo apt install apt-transport-https
curl -fsSL https://packagecloud.io/webc2/webc2/gpgkey | sudo gpg --dearmor -o /usr/share/keyrings/webc2.gpg
echo "deb [signed-by=/usr/share/keyrings/webc2.gpg] https://packagecloud.io/webc2/webc2/debian/ buster main" | sudo tee /etc/apt/sources.list.d/webc2.list
sudo apt update