Error: Couldn't find preset "" relative to directory "/Users/xxx/workspace/react-server-boilerplate/server" 

What's going on?

```js
"scripts": {
    "start": "nodemon server/index.js --exec babel-node --presets es2015,stage-0"
  },
```

I think the `readme.md` file is wrong.

The correct script is:

```js
"scripts": {
    "start": "nodemon server/index.js --exec babel-node --presets=es2015,stage-0"
  },
```

`=` symbol