Variable for polling time

[TheLion]

Is your feature request related to a problem? Please describe.
It would be nice if you can add a variable (in Env of container) for the polling time

Describe the solution you'd like
With a previous script (which broke with the last update) I polled the API for the armState every minute and that worked just fine.

Describe alternatives you've considered
Or the possibility that it polls the API at startup. Now after startup you have to wait 10 min for the poll and find out your Node-RED config is wrong and doesn't work ;-)

Additional context
Add any other context or screenshots about the feature request here.