---> b176cc40e715 Step 4/9 : RUN dotnet build ---> Running in 60c4291d516a Microsoft (R) Build Engine version 15.9.20+g88f5fadfbe for .NET Core Copyright (C) Microsoft Corporation. All rights reserved.
MSBUILD : error MSB1011: Specify which project or solution file to use because this folder contains more than one project or solution file. The command '/bin/sh -c dotnet build' returned a non-zero code: 1