Update to use payload for landing page

apps/next/src/payload.config.ts

@@ -4,10 +4,13 @@ import { buildConfig } from 'payload';
 import sharp from 'sharp';
 
 import { env } from './env';
+import { Users } from './payload/collections/users';
+import { LandingPage } from './payload/globals/landing-page';
 
 export default buildConfig({
   editor: lexicalEditor(),
-  collections: [],
+  collections: [Users],
+  globals: [LandingPage],
   secret: env.PAYLOAD_SECRET ?? '',
   db: postgresAdapter({
     pool: {