Server js file with pokemon list

server.js

const app = require('express')();
const path = require('path');

//setting our app engine to handlebars
app.set('views', path.join(__dirname,'views'));
app.set('view engine', 'hbs');

app.get('/',(request,response)=>{
  let _pokemonList = getRandomPokemonList();
   response.render('index',{pokemon:_pokemonList});
});

let getRandomPokemonList = () => {
  let _names = ['Pikachu' , 'charlizard' , ' Bulbasaur', 'Butterfree', 'Greninja'];
  let limit = Math.floor(Math.random()*(_names.length -1 -0) +0); //generating random number between 0-4

  return _names.slice(limit);
}

app.listen(3020,()=>console.log('node.js express server started at port 3020'));