모든 웹 페이지에 viewport 지정

oauth_kakao/oauth_fail.html

@@ -3,6 +3,7 @@
 <head>
     <meta charset="UTF-8">>
     <meta http-equiv="X-UA-Compatible" content="ie=edge">
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
     <title>OAuth 로그인 실패</title>
 </head>
 <body>