question about "mqtt-quick-introduction"

[gianpaolof]

Hi. I've been following the mqtt quick intro and everything worked fine until the very last part.
It seems I cannot get the subscription working. I keep on publishing sensor updates but I dont see anything here:

mosquitto_sub -h localhost -p 1884 -t my.sensors.notifications/#

instead on this topic I see the updates:

mosquitto_sub -h localhost -p 1884 -d -t my.sensors/sensor01

I am running everything on a local machine with docker and I use 2 mqtt services:

hivemq:
image: hivemq/hivemq4
networks:
default:
aliases:
- hivemq
ports:
- 8181:8080
- 1883:1883

mosquitto:
image: eclipse-mosquitto
networks:
default:
aliases:
- mosquitto
ports:
- 1884:1883
- 9002:9001
volumes:
- ./mosquitto.conf:/mosquitto/config/mosquitto.conf

The mosquitto conf:
listener 1883
listener 9002
protocol websockets
allow_anonymous true

In the json connections I am using these uri:
source "uri": "tcp://hivemq:1883",
target "uri": "tcp://mosquitto:1883",

Am I making mistakes with anything?