buildx failed with: ERROR: failed to solve: process "/bin/sh -c if [ \"$TARGETPLATFORM\" = \"linux/amd64\" ]; then RID=linux-x64 ; elif [ \"$TARGETPLATFORM\" = \"linux/arm64\" ]; then RID=linux-arm64 ; elif [ \"$TARGETPLATFORM\" = \"linux/arm/v7\" ]; then RID=linux-arm ; echo \"this ist arm\" ; fi && dotnet build \"ShareLoader.csproj\" -c Release -o /app/build -r $RID" did not complete successfully: exit code: 1