We bring up a zerotier node using a Zerotier docker image and let it join a network. In this process, can we also somehow set the “Allow ethernet bridging” config for this member? I see there is a field exposed in the REST API, but is it possible via the CLI?
The REST API is the only way to interact with that. The network controller is what determines what can & cannot be a bridge on the network. The client itself cannot change that setting.