How to fix Access-Control-Allow-Origin on nginx?

Question

Nginx

Good day, I've been trying to fix this for quite a long time, everything is even.

Answer 1

I somehow connect in conjunction with express:
npm i cors --save

const app = express()
const server = http.Server(app)
const io = socketIO(server, {
  path: `${API_PREFIX}/ws`
})

app.use(cors())

and in general, I didn’t even know that there was a hemorrhoid with cors