I keep seeing the following errors with 0.20 netclient via docker.

[netclient] 2023-05-27 16:21:51 Starting firewall... 

[netclient] 2023-05-27 16:21:51 iptables is not supported, using nftables 

[netclient] 2023-05-27 16:21:51 failed to intialize firewall:  firewall support not found

an update to docker-netclient firewalls is coming in next release