simple server for work width json files

serverjson.js

const http = require('http');
const todos = require('./data/todos.json');

const server = http.createServer(function (req, res) {
	if (res.statusCode > 200) {
		throw new Error('SERVER NOT STARTED', res.statusCode);
	}
	
	if (req.url == '/todos') {
		res.writeHead(200, {'Content-Type': 'application/json'});
		res.end(JSON.stringify(todos));
	} else if (req.url == '/todos/completed') {
		const completed = todos.filter(todo => todo.completed);
		res.writeHead(200, {'Content-Type': 'application/json'});
		res.end(JSON.stringify(completed));
	} else if (req.url.match(/\/todos\/\d+/)) {
		const id = parseInt(req.url.replace(/\D+/, ''));
		const todo = todos.find(todo => todo.id === id);

		if(!todo) {
			res.writeHead(404, {'Content-Type': 'text/plain'});
			res.end('Not found');
		} else {
			res.writeHead(200, {'Content-Type': 'application/json'});
			res.end(JSON.stringify(todo));
		}
	} else {
		res.writeHead(404, {'Content-Type': 'text/plain'});
		res.end('Not found');
	}

});

server.listen(8080, function () {
	console.log('server is starting ...');
});

todos.json

[
  {
    "id": 1,
    "title": "Изучить JS",
    "completed": true
  },
  {
    "id": 2,
    "title": "Изучить Nodejs",
    "completed": true
  },
  {
    "id": 3,
    "title": "Изучить Express",
    "completed": false
  },
  {
    "id": 4,
    "title": "Написать приложение",
    "completed": false
  }
]