How can I configure a local feed for nuget packages in VSCode?

I'm using VSCode with the official C# extension to develop a .NET Core console app on Ubuntu. I'd like to use a private nuget package in this console app. Usually one would add a local feed for nuget packages like described here with nuget init c:\packages \\myserver\packages. I've tried to find some settings in the C# extension which would allow me to configure a local feed for nuget packages but did not find any. Is it possible to do the same with the VSCode + C# extension builtin support?