fix(routes): use nodejs runtime for auth pages

We need to use `crypto` to hash and check validity of passwords. Simply
setting the runtime back to Node.js seemed like an easier fix than
debugging why we weren't using Vercel's `crypto` edge runtime.

app/routes/_layout.join.tsx

@@ -59,6 +59,8 @@ export const handle: Handle = {
   breadcrumb: () => <Link to='/join'>sign up</Link>,
 }
 
+export const config = { runtime: 'nodejs' }
+
 export async function loader({ request }: LoaderArgs) {
   const userId = await getUserId(request)
   if (userId) return redirect('/')

app/routes/_layout.login.tsx

@@ -36,6 +36,8 @@ export const handle: Handle = {
   breadcrumb: () => <Link to='/login'>login</Link>,
 }
 
+export const config = { runtime: 'nodejs' }
+
 export async function loader({ request }: LoaderArgs) {
   const userId = await getUserId(request)
   if (userId) return redirect('/')