buildx failed with: ERROR: failed to solve: process "/bin/sh -c if [ \"${TARGETARCH}\" = \"amd64\" ]; then curl -sSLo /usr/local/bin/dumb-init ${DUMB_INIT_AMD} && chmod +x /usr/local/bin/dumb-init; elif [ \"${TARGETARCH}\" = \"arm64\" ]; then curl -sSLo /usr/local/bin/dumb-init ${DUMB_INIT_ARM} && chmod +x /usr/local/bin/dumb-init; else echo \"Unsupported architecture\"; exit 1; fi" did not complete successfully: exit code: 1