style: styled-component Main(div) 추가

 import React from 'react';
+import styled from 'styled-components';
+
+const Main = styled.div`
+  width: 100%;
+`;
 
 const Home = () => {
-  return <div>Home</div>;
+  return (
+    <>
+      <Main>Home</Main>
+    </>
+  );
 };
 
 export default Home;