Add proper button for splash page

src/app/components/UploadButton.tsx

@@ -0,0 +1,15 @@
+import { faUpload } from '@fortawesome/free-solid-svg-icons'
+import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
+import Link from 'next/link'
+
+export function UploadButton ({ href }: { href: string }) {
+  return (
+    <>
+      <div className='relative'>
+        <Link href={href} className='top-button absolute -top-4 right-8'>
+          <FontAwesomeIcon icon={faUpload} />
+        </Link>
+      </div>
+    </>
+  )
+}