apollo-configservice/src/main/java/com/ctrip/framework/apollo/metaservice/controller/HomePageController.java/HomePageController/listAllServices
class HomePageController:  @GetMapping("/")
  public List<ServiceDTO> listAllServices() {
    List<ServiceDTO> allServices = Lists.newLinkedList();
    allServices
        .addAll(discoveryService.getServiceInstances(ServiceNameConsts.APOLLO_CONFIGSERVICE));
    allServices.addAll(discoveryService.getServiceInstances(ServiceNameConsts.APOLLO_ADMINSERVICE));

    return allServices;
  }