Node js without framework, check code

Question

I’m trying to work with nodejs without framework to get a more detailed idea of how Node works.

This code is the following: I make a request in the database and pass the result to renderFile to send the object to the page, and so be able to style the page with the data from the database.

There’s something wrong with that code?

It is a wrong way to go down this path without using any framework?

function onFunction(req,res){
    con.query('SELECT * FROM barbeiro', function(err,result,fields){
        ejs.renderFile('./index.ejs',{data: result},(err,html) => {
            res.writeHead(200, {'Content-type':'text/html'});
            res.write(html);
            res.end();
        });
    });
}