config based network setup: any doc?

[rtgiskard]

just like cni-plugins, does netavark support config based network setup?

• what I have found
  . plugin api
  . any doc with more details?

• what I'm confused
  . what's the standard full config for a network definition
  . where do I save the config

• further more
  . netavark have implemented firewall bakend selection based on env (issue), may I define it with the config?
  . cni-plugins config spec reference as an example