Copy Files from Host to Image with Docker

Question

I have a .NET Core Console app that I am trying to host within a Docker image. The default Dockerfile will not work for me because VSTS cannot run the Dockerfile AND retrieve NuGet packages from a private repo. For that reason, I'm looking to compile my project first. Then, copy the files from the ./bin/Release directory into the Docker image. However, at this time, I'm receiving the error message:

failed to build: COPY failed: no source files were specified

The directory of my solution and project look like this:

MySolution
  MyProject
    bin
      Release
        netcoreapp2.1
    Dockerfile
    Program.cs
    MyProject.csproj    
  .dockerignore
  docker-compose.dcproj
  docker-compose.override.yml
  docker-compose.yml
  MySolution.sln
  README.md

My Dockerfile looks like this:

FROM microsoft/dotnet:2.1-runtime AS base
WORKDIR /app
ENV myVariable 12345
COPY ./bin/Release/netcoreapp2.1/* /app

I don't understand why I'm getting the error no source files were specified . I can see them in the bin/Release/netcoreapp2.1 directory. What am I missing?

Answer 1

replace

COPY ./bin/Release/netcoreapp2.1/* /app

with

COPY ./bin/Release/netcoreapp2.1/. /app/