💄✨ oppdaterte stil på feilinnmeldings-siden og la til routing tilbake til hovedsiden

Co-authored-by: Sindre Kjelsrud <sindre.kjelsrud@nav.no>

frontend/pages/feil/index.tsx

@@ -4,6 +4,7 @@ import { ArrowLeftIcon, BugIcon, UploadIcon } from "@navikt/aksel-icons";
 import { Button, Heading, TextField, Textarea } from "@navikt/ds-react";
 import post from "../api/http";
 import { useState } from "react";
+import router from "next/router";
 
 export default function Feil() {
     const [tittel, setTittel] = useState("");
@@ -21,7 +22,9 @@ export default function Feil() {
     }
 
     return (
-        <main className="flex flex-col justify-center gap-32 p-16">
+        <main className="flex h-screen">
+            <div className="w-1/4 bg-bg-subtle"></div>
+            <div className="flex flex-col justify-center gap-32 p-16 grow">
                 <div className="w-1/2 flex flex-col gap-4 justify-center">
                     <BugIcon
                         title="Insekts ikon"
@@ -63,10 +66,15 @@ export default function Feil() {
                     <Button
                         variant="tertiary"
                         icon={<ArrowLeftIcon />}
+                        onClick={() => {
+                            router.push('/')
+                        }}
                     >
                         Gå tilbake til hovedmenyen
                     </Button>
                 </div>                
+            </div>
+            <div className="w-1/4 bg-bg-subtle"></div>
         </main>
     )
 }