Doc: Describe how to run locally better

[GoetzGoerisch]

e.g. add command to run a MQTT broker:

docker run -it -p 1883:1883 eclipse-mosquitto:2.0.10 mosquitto -c /mosquitto-no-auth.conf

[GoetzGoerisch]

First set of updates from @DasbachVDMA with #209

[Kantiran91]

I think we can close this isseu with https://github.com/umati/Dashboard-OPCUA-Client/blob/development/doc/MQTT.md

[DasbachVDMA]

@ainglessi did you encounter steps, while deploying locally, that were missing?

[ainglessi]

MQTT.md above references Mosquitto Go Auth plugin in current config so the whole "broker on Windows" section is outdated in my view. In local testing I used either remote broker running on our Google Cloud dev node or mosquitto-go-auth Docker container which packages both the broker and the plugin.

I believe the right way would be to update MQTT.md to include instructions for the auth plugin.

[Kantiran91]

do you really need a auth in local test?