server.js

const dgram = require('node:dgram');
const server = dgram.createSocket('udp4');

server.on('error', (err) => {
	console.log(`server error:\n${err.stack}`);
	server.close();
});

server.on('message', (msg, rinfo) => {
	// console.log(`server got: ${msg} from ${rinfo.address}:${rinfo.port}`);
	console.log(msg);
});

server.on('listening', () => {
	const address = server.address();
	console.log(`udp server listening ${address.address}:${address.port}`);
});

server.bind(1234);
// Prints: server listening 0.0.0.0:41234