Express not recieving POST data – CPanel

EDIT: We are now pretty sure it could be the .htaccess redirecting the POST because in the virtual server in cpanel we can POST correctly using curl, is this a thing. This is our .htaccess

RewriteBase /
RewriteRule ^index.html$ - [L]
 RewriteCond %{REQUEST_FILENAME} !-f
 RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.html [L]
RewriteEngine On
RewriteCond %{SERVER_PORT} 80
RewriteRule ^(.*)$ https://www.starrynights.co.nz/$1 [R,L]

EDIT: I am using express 4.17.1

EDIT: So far with the help of the below I have tried:

• adding bodyparser
• using post man to send through x-www-form-urlencoded
• installing multer and sending through form.data

All have come back with undefined when using postman

I am trying to POST to an express server however I cannot get my req.body.message to come back with the data, it only comes back as undefined.

This is deployed on cpanel and is using the Node.js application,

This is the code installed on it, it works when using localhost, however will not work deployed?

const express = require("express");
const cors = require("cors");
const router = express.Router();
const app = express();

app.use(cors());
app.use(express.json());
// app.use(express.urlencoded({ extended: true }));
app.use("/", router);

app.listen(3030, () => console.log("Server on 3030"));

router.post("/send_mail", (req, res) => {
    res.send(`the message is ${req.body.message}`);
    }
);

Post Man POST