Private Nuget Repositories - building Dockerfile in Visual Studio vs cli

[mahgo]

How does Visual Studio build a dockerfile differently compared to docker build in the cli? I'm trying to work out how dotnet restore authenticates with my private Azure Devops Artifacts nuget repository straight out of the box when the dockerfile is build in Visual Studio - whereas building with docker build, it does not. I know Visual Studio itself is authenticated with my nuget repository automatically, but I'm curious how this automatically works in the docker build in Visual Studio.

[NCarlsonMSFT]

For details on how VS is building your container see: https://aka.ms/containerfastmode#debugging

Short version: for VS debugging we build on windows, and volume map the result.

For building in the container, you will need to add a PAT for authenticating. Here is a stack-overflow with some suggestions: https://stackoverflow.com/questions/64839943/cannot-connect-to-azure-nuget-feed-when-creating-a-container

[mahgo]

Thanks, that explains it! I didn't realize that it doesn't use the Dockerfile when in Debug mode