1. Install the .NET Core SDK which includes support for attaching to the .NET Core debugger.

2. Install the C# VS Code extension which includes support for attaching to the .NET Core debugger in VS Code.

3. Mac users only: add /usr/local/share/dotnet/sdk/NuGetFallbackFolder as a shared folder in your Docker preferences.

1. If needed, create a .NET Core project with dotnet new.
2. Open the project folder in VSCode.
3. Wait until a popup shows, asking if you want to add required assets for debugging. Click "Yes":
4. Open the command palette (F1 by default) and enter Docker: Add Docker Files to Workspace.... If you have already dockerized your app, you can instead do Docker: Initialize for Docker debugging. Follow the prompts.
5. Switch to the debugging tab.
6. Select the "Docker .NET Core Launch" launch profile.
7. Optionally, set a breakpoint.
8. Start debugging! (F5 by default)

For additional customization options, see the documentation on Tasks and Debugging.