Readme update

README.rst

@@ -5,21 +5,62 @@ Ferrit
 .. image:: img/ferrit.jpg
    :alt: Ferrit
 
-----
 
-Ferrit is a Fake Gerrit server implementation
-created for functional testing of events
-in Jenkins & Gerrit Trigger ecosystem.
+Ferrit is a fake Gerrit server implementation created for functional testing of
+events in Jenkins & Gerrit Trigger ecosystem.
 
 ----
 
-Introduction
+Architecture
 ------------
 
-TODO
+Ferrit consists of two servers, http and ssh and companion script for
+generating payload for the ssh server.
+
+We relay on real Jenkins installation, so it has to be configured up front. See
+next section for details.
+
+Having Jenkins up and running, we can simultaneously run ssh and http servers
+by invoking:
+
+.. code:: shell-session
+
+   $ python3 gerrit_fake_http_server.py
+
+and
+
+.. code:: shell-session
+
+   $ python3 gerrit_fake_ssh_server.py
+
+Output of the last command will provide fifo file name used for triggering
+events in json format which can be generated using third part of the Ferrit -
+script `generate_event.py`.
+
+Installation
+------------
+
+Prerequisites
+=============
+
+.. TODO (jenkins, plugins installation and configuration)
+
+
+
+Python
+======
+
+Ferrit modules are written in Python and depends on two external libraries:
+
+- `paramiko`_ for ssh server
+- `bottle`_ for http server
+
+Please note, Python 2.x is not supported.
 
 
 `Ferrite image`_ by Karl-Martin Skontorp is on Attribution 2.0 Generic (CC BY
 2.0) license.
 
 .. _Ferrite image: https://www.flickr.com/photos/picofarad-org/2132206570/
+.. _paramiko: https://www.paramiko.org/
+.. _bottle: https://bottlepy.org