@GetMapping("/zone")
	public String zone() {
		Map<String, String> metadata = nacosDiscoveryProperties.getMetadata();
		return "provider zone " + metadata.get("zone");
	}
Provide interfaces to consumers.

@author fangjian0423, MieAh
spring-cloud-alibaba-examples/nacos-example/nacos-discovery-example/nacos-discovery-provider-example/src/main/java/com/alibaba/cloud/examples/EchoController.java