I am struggling in enabling Stackdriver Debugging in Kubernetes Engine. The documentation is here: https://cloud.google.com/debugger/docs/setup/dotnet

What does it mean by "When building the .NET Core application, be sure to add and deploy PDB files with your code"? And how do I go about doing this?

Also, what does it mean by "Use a custom Dockerfile"? And how do I go about doing this. I've found this documentation slightly vague.

Thanks!