MVC node server refactoring?

Question

Node.js

I made a server, but it consists of one file and I was told to make it according to the MVC architecture, I don’t know if I understood correctly what MVC is, but I’m trying to do the following thing. Where it says that the problem is here, I want the variable g to be a separate function, which I will of course move to another module, and that this function return the result of reply. If something is not clear, write, I will correct it, I really need help. But maybe I misunderstood the idea of ​​MVC and it does not need to be separated somehow, then I will be glad to hear how it should be. In essence, the question in general is, how do I correctly refactor this code, guided by the MVC architecture?

app.post('/get-staff',function(req,res) {
  prom=new Promise(function(resolve,reject) {
//проблема здесь
    let g=client.hgetall('user',function(err,reply) {
      return reply;
    });
    resolve(g);
//
  }).then(function(result) {
    return new Promise(function(resolve,reject) {
      client.get('id',function(err,reply) {
        console.log(reply);
        let arr=Array.of();
        for(let i=0;i<=reply;i++)
        {	
          arr.push(JSON.parse(result[i]));
        }
        resolve(arr);
      })
    }).then(function(result) {
      console.log(result);
      res.send(result);
      return ;
    });
  });
});