adding doc information

R1/source/docs/index.rst

@@ -3,7 +3,55 @@
 Varnish Documentation
 =====================
 
-Being written, check back in a few hours.
+The official documentation contains a **install guide**, a **tutorial**
+and a **reference**.
+
+We're trying to keep the official documentation in sync with the code.
+Both are kept in same source repository and both are available online:
+
+-  `Documentation for the latest release
+   4.1 <https://www.varnish-cache.org/docs/4.1/>`__
+-  `Documentation for the stable release
+   4.0 <https://www.varnish-cache.org/docs/4.0/>`__
+-  `Documentation for version
+   3.0 <https://www.varnish-cache.org/docs/3.0/>`__ (unsupported)
+-  `Documentation for version
+   2.1 <https://www.varnish-cache.org/docs/2.1/>`__ (unsupported)
+-  `Documentation for the current development
+   version <https://www.varnish-cache.org/docs/trunk/>`__ (git master)
+
+You also probably want to have a look at
+the old  \ `wiki <https://www.varnish-cache.org/trac/wiki>`__ - especially the
+`VCL Examples <https://www.varnish-cache.org/trac/wiki/VCLExamples>`__. 
+
+Quick install guides various operating systems:
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+-  `Ubuntu <https://www.varnish-cache.org/releases/install_ubuntu.html>`__
+-  `Debian <https://www.varnish-cache.org/releases/install_debian.html>`__
+-  `Red Hat Enterprise Linux and
+   Centos <https://www.varnish-cache.org/releases/install_redhat.html>`__
+-  `FreeBSD <https://www.varnish-cache.org/releases/install_freebsd.html>`__
+
+The Varnish Book
+----------------
+
+A comprehensive user guide for System Administrators and Web Developers
+in book format provided by \ `Varnish
+Software <https://www.varnish-software.com/>`__:
+
+-  `Online Reference Guide for the current stable  release
+   (4.0) <http://book.varnish-software.com/4.0/>`__
+-  `Online Reference Guide for version
+   3.0 <http://book.varnish-software.com/3.0/>`__ (unsupported)
+-  Get the book as a \ `PDF
+   download <http://book.varnish-software.com/>`__
+
+If you have feedback or want to make improvements to the book please do
+so by `filling
+issues <https://github.com/varnish/Varnish-Book/issues>`__ and/or send
+us `pull-requests <https://github.com/varnish/Varnish-Book/pulls>`__.
+
 
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