add a proper login page

pages/api/admin/login.ts

@@ -0,0 +1,27 @@
+import { authenticateAdmin } from '../../../lib/authenticate'
+import withSession from '../../../lib/session'
+
+async function loginHandler(req: any, res: any) {
+  const { method } = req
+
+  switch (method) {
+    case 'POST':
+      const { username, password } = req.body
+
+      if (!authenticateAdmin({ username, password })) {
+        res.status(401).end()
+        return
+      }
+
+      const userData = { username, role: 'admin' }
+      req.session.set('user', userData)
+      await req.session.save()
+
+      res.json({ message: 'Authenticated', user: userData })
+      break
+    default:
+      res.setHeader('Allow', ['POST'])
+      res.status(405).end(`Method ${method} Not Allowed`)
+  }
+}
+export default withSession(loginHandler)