Adding platforms to config.json breaks Homebridge
Hi

Every time I add a platform plugin, or any any other plugin to the configuration the HomeBridge service will not start start up again after restart. If I remove the platform plugin again, and leave assecories and platforms empty the service will start without any issues. The JSON validates.

My config.json (I use the Docker UI) is:

```
{
    "bridge": {
        "name": "Homebridge",
        "username": "CC:22:3D:E3:CE:30",
        "port": 51826,
        "pin": "003-01-201"
    },
    "description": "This is the Homebridge",
    "accessories": [],
    "platforms": [
        {
            "platform": "Camera-ffmpeg",
            "cameras": [
                {
                    "name": "Baghave",
                    "videoConfig": {
                        "source": "-re -i http://user:pass@192.168.1.183/video.cgi",
                        "stillImageSource": "-i http://user:pass@192.168.1.183/image/jpg",
                        "maxStreams": 2,
                        "maxWidth": 1280,
                        "maxHeight": 720,
                        "maxFPS": 30
                    }
                }
            ]
        }
    ]
} 
```

What is wrong with my setup?

Running Raspberry Pi 3 b+ with latest software, and on fresh installation, following the Docker Homebridge Raspberry Pi installation instructions from you.

Best Regards
Stig :-)