LISTEN_ONLY mode does not work as documented

[JeffFaer]

$  docker run --rm -ti -e LISTEN_ONLY=yes -e RTL_MSGTYPE="all" --device=/dev/bus/usb:/dev/bus/usb allangood/rtlamr2mqtt
Traceback (most recent call last):
  File "/usr/bin/rtlamr2mqtt.py", line 38, in <module>
    log_message('Starting in LISTEN ONLY Mode...')
NameError: name 'log_message' is not defined

Here's what I found in /usr/bin/rtlamr2mqtt.py: https://gist.github.com/JeffreyFalgout/313e33ee11f543b5b39f242eadb2ca76

which doesn't seem to match what's currently in the repo

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Looks like the latest image was last updated 7 months ago. Specifying allangood/rtlamr2mqtt:2.3.3 lets it work