Linux is the default environment for the official .net core docker images. You can see this on Microsoft's official docker page[0]. For non-linux builds, you

Linux is the default environment for the official .net core docker images. You can see this on Microsoft's official docker page[0]. For non-linux builds, you have to specifically ask for the nanoserver images. ex: microsoft/dotnet:latest is a debian based image[1] microsoft/dotnet:core is a debian based image[2] [0] - https://hub.docker.com/r/microsoft/dotnet/ https://hub.docker.com/r/microsoft/dotnet/ [1] - https://github.com/dotnet/dotnet-docker/blob/master/1.0.0-preview2/debian/Dockerfile https://github.com/dotnet/dotnet-docker/blob/master/1.0.0-pr... [2] - https://github.com/dotnet/dotnet-docker/blob/master/1.0/debian/core/Dockerfile https://github.com/dotnet/dotnet-docker/blob/master/1.0/debi...