add nacos online method.

qg-discovery-starter/src/main/java/cn/quantgroup/boot/ServiceDeployEndpoint.java

@@ -3,6 +3,7 @@ package cn.quantgroup.boot;
 
 import com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration;
 import org.springframework.boot.actuate.endpoint.annotation.ReadOperation;
+import org.springframework.boot.actuate.endpoint.annotation.WriteOperation;
 import org.springframework.boot.actuate.endpoint.web.annotation.WebEndpoint;
 import org.springframework.context.annotation.Configuration;
 
@@ -19,4 +20,9 @@ public class ServiceDeployEndpoint {
   public void offLine() {
     nacosAutoServiceRegistration.stop();
   }
+
+  @WriteOperation
+  public void onLine(){
+    nacosAutoServiceRegistration.start();
+  }
 }
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