Brain dead implementation of iperf3 server based on https://iperf.fr/iperf-servers.php#host-iperf3
Please refer to iperf3 documentation or iperf3 command if you want to customize server parameters.
To run it:
$ docker run -d --name iperf3-server -p 5200:5200 -p 5201:5201 quay.io/ssro/iperf3
Obviously you need to add more -p arguments to open the rest of the ports until 5209.