This image contains Eclipse Mosquitto 1.4.15, in an Alpine base image. It's based on foertel/armhf-alpine-mosquitto.
To run:
docker run -p 1883:1883 mjenz/rpi-mosquitto
To install as a service:
docker run -p 1883:1883 --detach --restart unless-stopped --name mosquitto mjenz/rpi-mosquitto