Thanks for checking. I think I'm still missing something.
Do you get the same behaviour on the latest binary from the repo and supplied Analog_Bridge.ini?
If I do the following on a Pi running Raspbian (No docker) I still get an empty stdout.log, but if I run it without redirecting the output I see it in the console -
git clone https://github.com/DVSwitch/Analog_Bridge.git
./bin/Analog_Bridge.armhf Analog_Bridge.ini >stdout.log 2>stderr.log