How is DbContext resolved at design-time in new ASP.NET Core projects?

The [Design-time DbContext Creation](https://learn.microsoft.com/en-us/ef/core/cli/dbcontext-creation) article in the docs explains how some EF Core Tools commands need to instantiate the application's `DbContext` in order to gather certain information, and that in ASP.NET Core projects, this is done by calling `Program.CreateHostBuilder()` to build the DI container, and then requesting the `DbContext` from the container.

This makes sense, except that it's been quite a while since ASP.NET Core projects no longer have a `Program.CreateHostBuilder()`, `Startup.cs`, etc. and all that code is now "flattened", if you will, inside `Program.cs`.

So, I was wondering how EF accomplishes the same thing now in this new structure? Does it, for example, execute everything in `Program.cs` up until `app.Build()`, or some sort of logic like that?

It would also be nice if the documentation I linked to could be updated to reflect this change in ASP.NET Core.