add a proper login page

lib/session.ts

@@ -1,4 +1,5 @@
 import { withIronSession, Handler } from 'next-iron-session'
+import { getBaseURL } from '../helpers/url'
 
 const SESSION_SECRET =
   process.env.SESSION_SECRET || 'dev-env-default-secret-991823723'
@@ -19,8 +20,17 @@ export default function withSession(handler: Handler) {
 export const isAdminSession = function (req: any, res: any) {
   const user = req?.session.get('user')
   if (user && user.role === 'admin') {
-    return true
+    return user
   }
-  res.status(401).end('Your are unauthorized. Best to move along...')
+
+  const redirectTargetUrl = `${getBaseURL()}/admin/login?redirect=${encodeURIComponent(
+    req.url
+  )}`
+
+  res.writeHead(303, {
+    Location: redirectTargetUrl,
+  })
+  res.end()
+
   return false
 }