res.render, res.write and Jade

I'm trying to make simple ftp client in Node.js. Everything works fine, but I don't know how to write "singleFile.name" in my Jade template.

app.post('/ftp/login', function(req, res){
  ftp.ls("/directory", function(err, files){
      if (err) return console.error(err);

      files.forEach(function(singleFile) {
        if (singleFile != null){
        console.log(singleFile.name + "<br>");
        }
      });
  });

 res.render('ftpLogin', { host: fHost, username: fUsername, port: fPort});
});

There's no problem without "res.render", but i want add it into my template.

res.writeHead(200, {"Content-type" : "text/html; charset=utf-8"});
[...]
res.write(singleFile.name + "<br>");
[...]
res.end();

I'm newbie (3 days Node learning), so I will be glad for all your responses to mistakes.

Thank you!