Useful or not, from you.
docker-kafka Connection to node 0 (kafka/127.0.0.1:443) could not be established. Broker may not be available.

Hello,

I tried following the instructions on the readme and when I reached the step to test the Kafka instance, when I run the command kafka-console-producer --broker-list kafka:9092 --topic test and input the message "message1"

Operating System: MacOS Version: 10.14.6

Is there anything I'm doing wrong

That's a useful answer
Without any help

Thanks very much, @krisgeus

This new command fixed the issue 😄