Minimal runtime dependencies should be captured in a --slim variant

[dleeapho]

NAME
--slim variant for dotnet cli apps

SYNOPSIS
Provide the smallest possible base image for any .NET Core app to run in.

DESCRIPTION
Developers can use dotnet publish and dotnet compile --native to encapsulate runtime dependencies that can then be COPY'd to a minimal-footprint image (i.e. excludes dotnet cli toolchain). Yet there are Linux packages that are needed for any .NET Core app to run; for example, ICU). Are there other minimal dependencies that should be included?

[MichaelSimons]

#36 added core-deps and core images. core-deps image only contains the .NET Core dependencies necessary to run a standalone app on. The core image only contains the .NET runtime which is necessary to run a standard app on.