Install .Net 3.0 diagnostic tools in a docker container

Dockerfile

# https://github.com/dotnet/diagnostics/issues/573#issuecomment-543886037

# dotnet tools are currently available as part of SDK so we need to create them in an sdk image
# and copy them to our final runtime image
FROM mcr.microsoft.com/dotnet/core/sdk:3.0 AS tools-install
RUN dotnet tool install --tool-path /dotnetcore-tools dotnet-sos
RUN dotnet tool install --tool-path /dotnetcore-tools dotnet-trace
RUN dotnet tool install --tool-path /dotnetcore-tools dotnet-dump
RUN dotnet tool install --tool-path /dotnetcore-tools dotnet-counters

FROM mcr.microsoft.com/dotnet/core/aspnet:3.0.0

RUN apt-get update \
  && apt-get upgrade -y \
  && apt-get install -y \
     file \
     lldb \
  && rm -rf /var/lib/apt/lists/*

COPY --from=tools-install /dotnetcore-tools /opt/dotnetcore-tools
ENV PATH="/opt/dotnetcore-tools:${PATH}"
RUN dotnet-sos install