elk, system운용현황 dashboard url link

LOG/SYSTEM/README.md

@@ -9,7 +9,7 @@ ELK Stack을 이용한 www.hongsnet.net `System` 로그분석을 운영 한다.
 
 - [ELK Stack 구성내역 바로가기](https://gitlab.hongsnet.net/joohan.hong/joohanhong/tree/master/LOG)
 
-- [ELK System Dashboard 바로가기]()
+- [ELK System Dashboard 바로가기](https://elk-demo.hongsnet.net/app/dashboards#/view/1c7de080-8b78-11eb-8686-cb443298d4ed?_g=(filters:!(),refreshInterval:(pause:!t,value:0),time:(from:now-15m,to:now))&_a=(description:'',filters:!(),fullScreenMode:!f,options:(hidePanelTitles:!f,useMargins:!t),query:(language:kuery,query:''),timeRestore:!f,title:'www.hongsnet.net%20%EC%8B%9C%EC%8A%A4%ED%85%9C%EC%9A%B4%EC%98%81%ED%98%84%ED%99%A9',viewMode:view))
 
 > ELK DEMO의 **로그인 정보**는 포트폴리오 참조