CORS preflights error when using redirect - express

Question

I`m trying to realize redirecting to another page of my app (current location 'http://localhost:3000/create-item' redirect to 'http://localhost:3000/subscribe') after saving item to database on my express server using next code (client send POST message to endpoint with form data):
await item.save();
res.writeHead(302, { Location: 'http://localhost:3000/subscribe' });
res.end();
one more variant:
await item.save();
res.redirect('/subscribe');
In base file of my server index.js i use my custom CORS middleware:
//cors.middleware.js
function cors(req, res, next) {
res.header('Access-Control-Allow-Origin', '*');
res.header('Access-Control-Allow-Methods', 'GET, PUT, PATCH, POST, DELETE, OPTIONS');
res.header(
'Access-Control-Allow-Headers',
'Origin, X-Requested-With, Content-Type, Accept, Authorization',
);
next();
}
module.exports = cors;
//index.js
const corsMiddleware = require('./middleware/cors.middleware');
app.use(corsMiddleware);
I also tryed:
npm i cors
app.use(cors());
Nevertheless I recieve CORS error while redirecting. So, what I`m doing wrong? Maybe this is related to sending data with POST method (redirect inside GET endpoint working well without CORS erro)