Log progress bar output

Hi,

I am trying to log the progress bar in a dockerized task to be able to see and potentially debug when I encounter any problem in one of my parallelized tasks.

While I have the enviroment variable `R_PROGRESSR_ENABLE=TRUE` I am not able to log the bar to the log output.

Just FYI I am using kubernetes to deploy my tasks. 

Does anybody has any hint on how to proceed from here?
