docs(server-nestjs): add comment for baseUrl option

Author: ppodds

packages/server/src/nestjs/interfaces/api-handler-options.interface.ts

@@ -1,5 +1,18 @@
 import { AdapterBaseOptions } from "../../types";
 
 export interface ApiHandlerOptions extends AdapterBaseOptions {
+    /**
+     * The base URL for the API handler. This is used to determine the base path for the API requests.
+     * If you are using the ApiHandlerService in a route with a prefix, you should set this to the prefix.
+     * 
+     * e.g.  
+     * without baseUrl(API handler default route):
+     * - RPC API handler: [model]/findMany
+     * - RESTful API handler: /:type
+     * 
+     * with baseUrl(/api/crud):
+     * - RPC API handler: /api/crud/[model]/findMany
+     * - RESTful API handler: /api/crud/:type
+     */
     baseUrl?: string;
 }