https://packages.ucview.com/

Run this in a terminal for Ubuntu 18.04 and above.
*** Recommended upgrade nginx ***
curl https://nginx.org/keys/nginx_signing.key | gpg --dearmor | sudo tee /usr/share/keyrings/nginx-archive-keyring.gpg >/dev/null
echo "deb [signed-by=/usr/share/keyrings/nginx-archive-keyring.gpg] http://nginx.org/packages/ubuntu $(lsb_release -cs) nginx" | sudo tee /etc/apt/sources.list.d/nginx.list
*** Required UCView ***
curl https://packages.ucview.com/public.gpg | gpg --dearmor | sudo tee /usr/share/keyrings/ucview-archive-keyring.gpg >/dev/null
echo "deb [signed-by=/usr/share/keyrings/ucview-archive-keyring.gpg] http://packages.ucview.com/dists/$(lsb_release -cs) ./" | sudo tee /etc/apt/sources.list.d/ucview.list
sudo apt-get update
sudo env DEBIAN_FRONTEND=noninteractive apt-get install ucview-appliance8 ucview-nginx8