Adding Trussworks USWDS React Wrapper (#67)

* removing unused js
* Working for first load, second raises 'failed to SSR' without DEV_SSR enabled. We will need to fix this before prod

client/src/pages/index.tsx

@@ -1,15 +1,15 @@
 import * as React from "react"
+import {GovBanner} from '@trussworks/react-uswds';
 
 // markup
 const IndexPage = () => {
   return (
-    <>
       <main>
+        <GovBanner />
         <title>Justice40</title>
         <h1>Justice40</h1>
       </main>
-    </>
   )
 }
 
-export default IndexPage
+export default IndexPage;