How to set up a local server and dd-wrt router to make external post requests?

Question

network hardware

I already asked this question yesterday. But the problem was that I had a "gray ip".
Enabled static ip service.
But still I can't make a request to my server from outside.

Server on node js.

const express = require('express');
const app = express();

const port = 3000;

app.listen(port, ()=>{
    console.log('we are live on port '+port)
});

app.post('/',(req, res)=>{
    res.send('hello');
})

forwarded ports on the router.


Perhaps it has something to do with the fact that I am making a request from the same device where the server is deployed