feat: lots of updates

src/routes/404/index.js

@@ -0,0 +1,6 @@
+// import React from 'react';
+import StyledWrapper from "./styled";
+
+export default function NotFoundPage() {
+  return <StyledWrapper>404 page</StyledWrapper>;
+}

src/routes/404/styled.js

@@ -0,0 +1,6 @@
+import styled from 'styled-components';
+const StyledWrapper = styled.div`
+ display: flex;
+`;
+
+export default StyledWrapper;