You goal requires ble working in RCP mode. Refer to this to upgrade it to RCP mode.
And then you need to close the corresponding dusun host program.
mv /usr/bin/bul /usr/bin/bul-b
mv /usr/bin/bflash /usr/bin/bflash-b
Then you may need to manually install bluez and other packages you need.
And if necessary, specify the ble communication port /dev/ttyUSB0
in your docker configuration file.