Smarter ASP.NET Core Docker File

Dockerfile

FROM microsoft/dotnet:2.0-sdk as builder  
 
RUN mkdir -p /root/src/app/aspnetcoreapp
WORKDIR /root/src/app/aspnetcoreapp
 
#copy just the project file over
# this prevents additional extraneous restores
# and allows us to resuse the intermediate layer
# This only happens again if we change the csproj.
# This means WAY faster builds!
COPY aspnetcoreapp.csproj . 
#Because we have a custom one
COPY nuget.config . 
RUN dotnet restore ./aspnetcoreapp.csproj 

COPY . .
RUN dotnet publish -c release -o published -r linux-arm 

#Smaller - Best for apps with self-contained .NETs, as it doesn't include the runtime
FROM microsoft/dotnet:2.0.0-runtime-deps-stretch-arm32v7 

#Bigger - Best for apps .NETs that aren't self-contained.
#FROM microsoft/dotnet:2.0.0-runtime-stretch-arm32v7

#FROM microsoft/dotnet:2.0.0-runtime-deps
#FROM microsoft/dotnet:2.0.0-runtime

WORKDIR /root/  
COPY --from=builder /root/src/app/aspnetcoreapp/published .
ENV ASPNETCORE_URLS=http://+:5000
EXPOSE 5000/tcp
#CMD ["dotnet", "./aspnetcoreapp.dll"]  
CMD ["./aspnetcoreapp"]