Update README.rst

README.rst

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 PAServerDockerfile
 ==================
 
-Dockerfile to build images for Planetary Annihilation Servers
+Dockerfile to build images for Planetary Annihilation Servers.
 
-Documentation source
---------------------
-PA server installation procedure is available at `EXOSUD ESPORTS<http://http://exodusesports.com/guides/planetary-annihilation-dedicated-server-setup>`_
+Note : this project is an early stage. Please report any issue to github bug tracker.
+
+PAServer documentation source
+-----------------------------
+PA server installation procedure is available at `EXODUS ESPORTS <http://exodusesports.com/guides/planetary-annihilation-dedicated-server-setup>`_.
+
+The dockerfile will try to automate and produce a system configuration similar as the above procedure.
+
+* Variation from the initial procedure
+** Installation in a docker image to easily deploy new servers and improve security.
+** Operating system changed to latest Ubuntu image 15.04 (Vivid Vervet), intead of 14.04 (Trusty Tahr).
+** Image use colors from 
 
-This dockerfile will try to automate the above procedure in order to create a docker image pa server 
 
 Prerequisites
 -------------
-* Docker
+* Install docker.
+* Update sudoers to avoid enter your password each time (optional).
  
 
 Build instructions
 ------------------
+# Clone the repo with git.
+# Change directory to the repository and run buildImage.sh.
+# Answer the script questions.
 
 
 Run instructions