Test if it's a Proxmox host
Call define_vars function
Verify if the ct_id is available on the host
Add color to important value in DEBUG mode
Function to verify current LXC container state
New function to start the container
Add option to define sleep_delay
Function to upgrade the container
Keep output only if DEBUG mode
Function to stop the container
error_message function and exit if CT is running
Working script to upgrade an LXC CT (a template)