fix: resolve build & export 404 component

src/pages/404.tsx

@@ -1,16 +1,13 @@
 import React, { Fragment } from "react"
-import * as SC from "./styles"
 
 import { SEO } from "../components/SEO"
+import { FourZeroFour } from "../components/FourZeroFour"
 
 function NotFoundPage() {
   return (
     <Fragment>
       <SEO title="404: Not found" />
-      <SC.StyledDiv>
-          <SC.StyledH1>NOT FOUND</SC.StyledH1>
-          <SC.StyledPara>You just hit a route that doesn&#39;t exist... the sadness.</SC.StyledPara>
-      </SC.StyledDiv>
+      <FourZeroFour title="NOT FOUND" />
     </Fragment>
   )
 }