Why does the container generate certificates each time it runs?

[expertchoice]

I'm not sure I understand the purpose of this container. Is this for temporary "one-off" vpn access? Anytime I execute a command, such as

sudo bash setup.sh -n

The container generates an entirely new server certificate. Ideally I'd only have to do that once and be able to use pivpn like I normally would with a non-container installation.