A note for users that secured their setup with Tailcale like me: obviously you need to enter the physical ip address of the device (where Node-RED is running) in the webhook input field, and not the virtual hostname of that device. Because the doorbell cannot resolve that hostname to an io address, since the doorbell is not part of your tailnet. Because you cannot install a Tailscale agent on it.
Which is a pitty because I wanted to close down all traffic to my port 1880 directly (via iptables). And that is now not possible anymore...
