Aspire service discovery support

[petermorlion]

For a course on architecture, I want to use Refit to showcase N-tier architectures. But I can't seem to get Refit to work with Aspire service discovery. Basically, what I have is this what I have in my Aspire AppHost:

var businessTier = builder.AddProject<Projects.BusinessTier>("businesstier")
    .WithReference(db)
    .WaitFor(db);

builder.AddProject<Projects.PresentationTier>("presentationtier")
    .WithReference(businessTier)
    .WaitFor(businessTier);

In my Presentation tier, the Program.cs has this:

builder.Services.AddServiceDiscovery(); // doesn't work with or without this
builder.Services.AddRefitClient<IBusinessLayerApi>()
    .ConfigureHttpClient(c => c.BaseAddress = new("https://businesstier"));

(where IBusinessLayerApi is the interface where I put Refit's attributes on)

From the official docs I assumed that something 🪄magical🪄 was going to happen and that the URL would be replaced with the correct one (https://localhost:7195 in my case), but that doesn't seem to happen?

What's the correct way to integrate Refit with Aspire?