スマホ・レーアウト・バグ（#304） (#305)

#304

#304

#304

Co-authored-by: miteruzo <miteruzo@naver.com>
Reviewed-on: #305

frontend/src/index.css

@@ -46,10 +46,12 @@ a
 body
 {
   margin: 0;
-  display: flex;
-  place-items: center;
   min-width: 320px;
-  min-height: 100vh;
+}
+
+#root
+{
+  min-height: 100dvh;
 }
 
 h1