add model info handler

config.json

 {
-  "nm_seed": "192.168.1.241:10001",
+  "nm_seed": "192.168.1.109:10001",
   "docker_server": "tcp://127.0.0.1:2375",
-  "api_url": "http://192.168.1.8:8087/api/task/taskheat",
+  "api_url": "http://192.168.1.109:8087/api/task/taskheat",
   "node_manager_num": 1,
   "heart_response": 30,
   "task_validator_time": 1,
   "container_num": 1,
   "chain_id": 100,
-  "validator_url": "192.168.1.211:9431"
+  "validator_url": "192.168.1.109:20011"
 }
\ No newline at end of file

nm/model_handler.go

@@ -32,6 +32,14 @@ func monitorModelInfo(dockerOp *operate.DockerOp) {
 				continue
 			}
 			resp := &models.Resp{}
+			if resp.Code != http.StatusOK {
+				log.Error("Response code :", resp.Code)
+				continue
+			}
+			if resp.Data == "" {
+				log.Warn("Response data is empty")
+				continue
+			}
 			err = json.Unmarshal(bodyBytes, resp)
 			if err != nil {
 				log.Error("Unmarshal model response failed:", err)