There are many typos in the code, to make it working i had done the changes.

To Create a https server you have to make use of built-in node.js https module and create a https server by passing your certificates, as below

GoTo - https://localhost:8080/

Response:

{ message: "this is served in https" }

var express = require('express');
var https = require('https');
var fs = require('fs');

var app = express();
var port = process.env.EXPRESS_PORT || 8080;
var options = {
  key: fs.readFileSync('key.pem'),
  cert: fs.readFileSync('cert.pem')
}
console.log("helloo?");

app.get('/', function(req, res) {
    res.json({
        message: 'this is served in https'
    })
})

var secure = https.createServer(options, app); // for express

secure.listen(port, function() {
    console.log('localhost started on', port)
})

// for just node server request listener

/* https.createServer(options, (req, res) => {
  res.writeHead(200);
  res.end('hello world\n');
}).listen(port); */

I wrote a basic code for you . i think it will work for your answer and to you. try this.other thing is if you are using express then no need to import http module to connect to the server . I have commented some code , try those one by one.

var express = require('express');
var app = express();
const fs = require('fs');
//const  http = require('http');

app.set('port',process.env.PORT || 3000);

app.get('/',function(req, res){
  res.send('Hellow World');
});

const fileName = __dirname + '/test.txt';
fs.readFile(fileName, (err, data) => {
   if (err) {
       console.error(err);
   }console.log('Done!');
   console.log(data.toString());
});

//or
/*
const data = fs.readFileSync(fileName);
console.log(data.toString());
*/

//below code will print whatever characters inside test.txt into test-copy.txt file
/*
const filename = __dirname + '/test.txt';
const outFileName = __dirname + '/test-copy.txt';

const readStream = fs.createReadStream(filename);
const writeStream = fs.createWriteStream(outFileName);

readStream.pipe(writeStream);

readStream.on('data', data => {
  console.log(data.toString());
});
*/
app.listen(app.get('port'), function(){
  console.log('Server listenning at port 3000');
});

First you have to create test.txt file and write something inside it. Next create tezt-copy.txt file if you try commented code.