구글 meta tag 추가

src/App.js

@@ -13,6 +13,10 @@ const App = props => (
         name='description'
         content='드론교통관리(UTM)자동 비행 승인 시스템 '
       />
+      <meta
+        name='google-site-verification'
+        content='GSleWImtb8xHj36_-GmULsryS1COxN9LRErUCDNTRG4'
+      />
     </Helmet>
     <Router />
   </>