fix magic link

src/app/api/customer/verify/route.ts

@@ -11,5 +11,9 @@ export async function GET(req: Request) {
   const target = email
     ? `${prefix}/min-sida/oversikt`
     : `${prefix}/min-sida/verifiera`;
-  return NextResponse.redirect(new URL(target, url.origin));
+  // Use the configured public origin — req.url.origin is the internal
+  // container host (e.g. http://<hash>:3000) when behind Traefik.
+  const base =
+    process.env.NEXT_PUBLIC_SITE_URL ?? process.env.AUTH_URL ?? url.origin;
+  return NextResponse.redirect(new URL(target, base));
 }