Change to non centos docker, due to RedHat close sourcing centos

[gedw99]

Great the code and project. The golang c interop is pretty nice.

Suggest changing to this docker: https://github.com/deluan/bring/blob/master/docker-compose.yml

Its also similar to your project, but uses ubuntu and the classic glyptodon/guacd

[changkun]

That's a good suggestion. I think I was intended to use ubuntu but there was some problem with ubuntu distribution and I had to use centos. It is necessary to do some investigation that to switch to ubuntu.

[gedw99]

Hey @changkun

thanks for considering this.

https://github.com/deluan/bring/blob/master/docker-compose.yml currently does work when i run it, so hopefully this is a good reference to help....