Can't access .local mDNS services?
On my Raspberry Pi, outside of the Docker container, pinging a `.local` host on the network works fine:

```
pi@rpi:~/homebridge $ ping -c 1 Phils-MacBook-Pro.local
PING Phils-MacBook-Pro.local (10.0.0.239) 56(84) bytes of data.
64 bytes from 10.0.0.239: icmp_seq=1 ttl=64 time=3.09 ms
```

But from the container, it doesn't:

```
pi@rpi:~/homebridge $ sudo docker-compose exec homebridge ping -c 1 Phils-MacBook-Pro.local
ping: bad address 'Phils-MacBook-Pro.local'
```

This makes it much harder to run homebridge plugins that rely on either a local IP or hostname from the local network.

Does this seem like a bug in this project? Or any suggestions for me?

Thanks for the great project.
