Add NOTE to improve cross-link to app base path content

Author: guardrex

aspnetcore/blazor/debug.md

@@ -137,6 +137,9 @@ In the following examples, the app is hosted at `/OAT` with an app base path con
 "inspectUri": "{wsProtocol}://{url.hostname}:{url.port}/OAT/_framework/debug/ws-proxy?browser={browserInspectUri}",
 ```
 
+> [!NOTE]
+> Using a custom app base path for Blazor WebAssembly apps requires special configuration, including a configuration in the app's `Program.Main` (`Program.cs`). For more information, see <xref:blazor/host-and-deploy/index#app-base-path>.
+
 # [Visual Studio Code](#tab/visual-studio-code)
 
 <h2 id="vscode">Debug standalone Blazor WebAssembly</h2>