I installed the eclipse broker with the command line:
docker run -it -d --name genbrkr -p 192.168.3.20:1883:1883 -v /Users/rss/Documents/mosquitto/mosquitto.conf:/Users/rss/Documents/mosquitto/config/mosquitto.conf eclipse-mosquitto:2
The broker image is in the Docker desktop Container, and indicates that it is running.
The generic broker is not available to the Indigo MQTT trigger.
If it is possible to use this broker, what is the Indigo configuration?
Note: using ports 1883:1883 and localhost was similarly unproductive.