public NacosUpdatingListener build() {
        return new NacosUpdatingListener(nacosClientBuilder.build(), endpoint);
    }
Returns a newly-created {@link NacosUpdatingListener} that registers the {@link Server} to
Nacos when the {@link Server} starts.
nacos/src/main/java/com/linecorp/armeria/server/nacos/NacosUpdatingListenerBuilder.java