I'm following a node.js crash course and I get to the part where we are creating a server, but for some reason every time I try to run node index which is my js file name I'm getting the error:

address already in use :::5000

I've looked through similar problems and tried to kill that specific port but nothing seems to work.

if (req.url === '/') {
  fs.readFile(
    path.join(__dirname, 'public', 'index.html'),
    (err, content) => {
      if (err) throw err;
      res.writeHead(200, { 'Content-Type': 'text/html' });
      res.end(content);
    }
  );
}

    
const PORT = process.env.PORT || 5000;

server.listen(PORT, () => console.log(`Server running on port ${PORT}`));

   node index 
    node:events:504
          throw er; // Unhandled 'error' event
          ^
    
    Error: listen EADDRINUSE: address already in use :::5000
        at Server.setupListenHandle [as _listen2] (node:net:1330:16)
        at listenInCluster (node:net:1378:12)
        at Server.listen (node:net:1465:7)
        at Object.<anonymous> (/Users/zacdistant/Documents/GUIDES AND TUTORIALS/Node JS Crash Course/index.js:91:8)
        at Module._compile (node:internal/modules/cjs/loader:1097:14)
        at Object.Module._extensions..js (node:internal/modules/cjs/loader:1151:10)
        at Module.load (node:internal/modules/cjs/loader:975:32)
        at Function.Module._load (node:internal/modules/cjs/loader:822:12)
        at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12)
        at node:internal/main/run_main_module:17:47
    Emitted 'error' event on Server instance at:
        at emitErrorNT (node:net:1357:8)
        at processTicksAndRejections (node:internal/process/task_queues:83:21) {
      code: 'EADDRINUSE',
      errno: -48,
      syscall: 'listen',
      address: '::',
      port: 5000
    }