add globalstyle, body overflow hidden

@@ -7,6 +7,7 @@ export default createGlobalStyle`
        box-sizing: border-box; 
        box-sizing: border-box; 
     }
     }
     html, body {
     html, body {
+        overflow: hidden;
         height: 100vh;
         height: 100vh;
     }
     }
     a {
     a {