MQTT message trigger
MQTT message: Fires when a message arrives on a topic. Supports MQTT wildcards: + is one level, # is the rest.
How to configure it
MQTT message takes topic, contains.
What it fires with
A run started by MQTT message can read input.topic, input.message, input.ts.
Where it runs
MQTT message runs on an operator's own Leumas instance and is not armable on the public site.