Not sure about Docker but openhabian is:
Check addons.cfg at etc/openhab2/services/addons.cfg
and addons.config at
/var/lib/openhab2/config/org/openhab/addons.config
If you change addons.config make sure to stop OH first sudo systemctl stop openhab2
Link to help with docker file location Using Sonoff Power Switches with Tasmota firmware and openHAB2 MQTT2 binding - #68 by scottk