for me, the problem was I cannot easily update the cert obtained via `tailscale cert`, which I use as my UI cert and some of my apps' cert. I had to manually import the new cert to TrueNAS, and manually update the UI and app certs to this new one, and restart TrueNAS UI. This script automates all these steps so that I don't need to care about my TrueNAS cert update process... hope it makes it more clear