Updated readme

Author: Dmitry Berezovsky

README.md

@@ -1,2 +1,20 @@
-# docker-teamcity
+# Docker Teamcity image
 Centos 7 + Java 8 + Teamcity
+
+This repository contains dockerfile for building image with Teamcity installed. In adition it downloads Postgresql driver and removes some of the default plugins: 
+
+* clearcase
+* mercurial
+* eclipse-plugin-distributor
+* vs-addin-distributor
+* win32-distributor
+* svn
+* dot*
+
+
+**NOTE**: Image contains only teamcity server without build agent.
+
+Also it is needed to update config file with your DB connection properties, or 
+
+Installation directory: /srv/apache-tomcat/webapps/ROOT
+Server directory: /home/app/.BuildServer