adjust dockerfile

src/aka.terribledev.io/Dockerfile

@@ -1,4 +1,4 @@
-FROM microsoft/dotnet:latest
+FROM microsoft/dotnet:2.1.400-sdk-alpine3.7
 
 COPY . /app
 
@@ -6,8 +6,11 @@ WORKDIR /app
 
 RUN ["dotnet", "restore"]
 
-RUN ["dotnet", "build"]
+RUN ["dotnet", "build", "--configuration", "Release"]
 
+RUN 'ls'
+ENV ASPNETCORE_ENVIRONMENT Production
+ENV ASPNETCORE_URLS http://*:5000
 EXPOSE 5000/tcp
 
-CMD ["dotnet", "run", "--server.urls", "http://*:5000"]
+CMD ["dotnet", "run", "--configuration", "Release"]