A simple method to get a valid SSL certificate for Veeam Backup for Azure Appliance
Script functioning is based on renewal via Certbot and Certbot-dns-cloudflare module
To Install on Ubuntu/Debian
sudo apt update
sudo apt install snapd
sudo snap install core
sudo snap refresh core
sudo snap install --classic certbot
sudo ln -s /snap/bin/certbot /usr/bin/certbot
sudo snap install certbot-dns-cloudflare