It's probably something ridiculous I'm missing out, but when I add an `object` to my `json` file with `NodeJs` it adds it (obviously?) at the end of the file and so after `]`

```
var file = './data/questions.json';    
fs.appendFile(file, ', ' + JSON.stringify(req.body), function (err) {
    console.log(err);
});

```

result is something like this:

```
[
{'id':1, 'name':'Tom'}
], {'id':2, 'name':'Jerry'}

```