Copy HTML page in local with nodejs

copy_html.js

const URL = ""
const rp = require('request-promise');
const fs = require('fs');

rp(URL).then(function(html){
      fs.writeFile("./res.html", html, function(err) {
          if(err) {
              return console.log(err);
          }
          console.log("The file was saved!");
      });
    })
    .catch(function(err){
      console.log(err);
    });