Issue

I've issue starting the nomachine server. The nomachine is looking for the user "user" but if I pass another user name via the environmental variable, then it is not working. So, I've modified the code by cloning this repo. 

I've made the username unchangeable, but one can set the password as they wish.

Here is the cloned repo: https://github.com/capriciousduck/xfce4-nomachine-docker