Multistage Dockerfile using Alpine

Dockerfile

FROM microsoft/dotnet:sdk AS build-env
WORKDIR /app

COPY *.csproj ./
RUN dotnet restore

COPY . ./
RUN dotnet publish -c Release -o out

# Pay attention to the following two lines
FROM microsoft/dotnet-nightly:2.1-runtime-alpine

# Alpine runtime doesn't expose 80 by default (Dang)
EXPOSE 80

WORKDIR /app
COPY --from=build-env /app/out .

# Replace Ledger.dll depending on which project 
# are you containerizing.
ENTRYPOINT ["dotnet", "Ledger.dll"]