[SàT dev][en] SàT and Libervia installable via Docker

[Goffi]

G'day,

we have just published Docker images to install easily Salut à Toi and 
Libervia. You can download the libervia manager script and make it 
executable like this:

$ wget 
http://repos.goffi.org/sat_docs/raw-file/tip/docker/libervia_cont.sh && 
chmod a+x libervia_cont.sh

Then to download/launch Libervia and all its dependencies, just do (once 
Docker is installed):
$ ./libervia_cont.sh

There are facilities to run, stop, update, backup, etc.

For more infomrations, check http://wiki.goffi.org/wiki/Docker/en

All feedbacks welcome (including the containers and the documentation).

Cheers
Goffi