Added SSH daemon for production Docker image

[diserens]

This will add a listening SSH daemon on port 1220 for external maintenance

[kuaka]

@biuti are you going to merge this?

[biuti]

I'm working on it, as it needs some modifications.
Already found a way, I'm preparing an image to be pushed on docker hub:
https://github.com/biuti/airscore
I'm testing the image, when I'm sure it's working correctly I'll import it in the project.