fix: replace HttpApi.empty with HttpApi.make('api') in http-server example (#84)

Author: beeman

examples/http-server/src/Api.ts

@@ -3,7 +3,7 @@ import { AccountsApi } from "./Accounts/Api.js"
 import { GroupsApi } from "./Groups/Api.js"
 import { PeopleApi } from "./People/Api.js"
 
-export class Api extends HttpApi.empty
+export class Api extends HttpApi.make('api')
   .add(AccountsApi)
   .add(GroupsApi)
   .add(PeopleApi)