buildx failed with: ERROR: failed to solve: process "/bin/sh -c echo \"Building BUILDPLATFORM: '${BUILDPLATFORM}', TARGETPLATFORM: '$TARGETPLATFORM'\"; export GOOS=$(echo $TARGETPLATFORM | cut -d / -f1); export GOARCH=$(echo $TARGETPLATFORM | cut -d / -f2); if [ \"$GOARCH\" = \"arm\" ]; then export GOARCH=\"arm\"; export GOARM=$(echo $TARGETPLATFORM | cut -d / -f3 | sed 's/v//g'); fi; export CGO_ENABLED=0; echo \"Building for $GOOS/$GOARCH/$GOARM\"; go build -ldflags=\"-s -w\" -o ./custom-exporter ." did not complete successfully: exit code: 1