buildx failed with: ERROR: failed to solve: process "/bin/sh -c if [[ -z \"$MCU\" ]] ; then echo Docker built without MCU repository ; else apt-get install -y git && mkdir -p /root/STM32Cube/Repository && cd /root/STM32Cube/Repository && git clone https://github.com/STMicroelectronics/STM32Cube${MCU}.git && cd STM32Cube${MCU} && git submodule update --init --recursive ; fi" did not complete successfully: exit code: 128