overview doc added

Author: vgvoleg

docs/index.rst

@@ -3,18 +3,17 @@
    You can adapt this file completely to your liking, but it should at least
    contain the root `toctree` directive.
 
-Welcome to ydb's documentation!
+YDB Python SDK
 ===============================
 
 .. toctree::
-   :maxdepth: 10
+   :maxdepth: 3
 
+   overview
    ydb.rst
    examples.rst
 
 
-
-
 Indices and tables
 ==================
 

docs/overview.rst

@@ -0,0 +1,50 @@
+Project Homepage
+================
+
+YDB Python SDK is hosted on GitHub at https://github.com/ydb-platform/ydb-python-sdk under the ydb-platform organization.
+
+Releases and project status are available on Pypi at https://pypi.org/project/ydb.
+
+The most recent published version of this documentation should be at https://ydb-platform.github.io/ydb-python-sdk.
+
+Installation
+============
+
+Prerequisites
+-------------
+
+* Python 3.8 or higher;
+* `pip` version 9.0.1 or higher;
+
+If necessary, upgrade your version of `pip`:
+
+::
+    $ python -m pip install --upgrade pip
+
+If you cannot upgrade `pip` due to a system-owned installation, you can run the example in a virtualenv:
+
+::
+    $ python -m pip install virtualenv
+    $ virtualenv venv
+    $ source venv/bin/activate
+    $ python -m pip install --upgrade pip
+
+Installation via Pypi
+---------------------
+
+To install YDB Python SDK through Pypi execute the following command:
+
+::
+    $ pip install ydb
+
+Community
+=========
+
+You can ask your questions in official Telegram chats:
+**EN** `Official YDB chat <https://t.me/ydb_en>`_.
+**RU** `Official YDB chat <https://t.me/ydb_ru>`_.
+
+
+Bugs and feature enhancements to YDB Python SDK should be reported on the `GitHub
+issue tracker
+<https://github.com/ydb-platform/ydb-python-sdk/issues/>`_.