Update description for PyPi

Author: amochin

setup.py

@@ -24,6 +24,61 @@
 except ImportError as error:
     from distutils.core import setup
 
+long_description = """
+The Database Library for [Robot Framework](https://robotframework.org) allows you to query a database and verify the results.
+It requires an appropriate **Python module to be installed separately** - depending on your database, like e.g. `oracledb` or `pymysql`. 
+
+The library consists of some keywords designed to perform different checks on your database.
+Here you can find the [keyword docs](http://marketsquare.github.io/Robotframework-Database-Library/).
+
+# Requirements
+- Python
+- Robot Framework
+- Python database module you're going to use - e.g. `oracledb`
+
+# Installation
+```
+pip install robotframework-databaselibrary
+```
+Don't forget to install the required Python database module!
+
+# Usage example
+```RobotFramework
+*** Settings ***
+Library       DatabaseLibrary
+Test Setup    Connect To My Oracle DB
+
+*** Keywords ***
+Connect To My Oracle DB
+    Connect To Database
+    ...    oracledb
+    ...    dbName=db
+    ...    dbUsername=my_user
+    ...    dbPassword=my_pass
+    ...    dbHost=127.0.0.1
+    ...    dbPort=1521
+
+*** Test Cases ***
+Person Table Contains Expected Records
+    ${output}=    Query    select LAST_NAME from person
+    Length Should Be    ${output}    2
+    Should Be Equal    ${output}[0][0]    See
+    Should Be Equal    ${output}[1][0]    Schneider
+
+Person Table Contains No Joe
+    ${sql}=    Catenate    SELECT id FROM person
+    ...                    WHERE FIRST_NAME= 'Joe'    
+    Check If Not Exists In Database    ${sql}
+```
+
+# Database modules compatibility
+The library is basically compatible with any [Python Database API Specification 2.0](https://peps.python.org/pep-0249/) module.
+
+However, the actual implementation in existing Python modules is sometimes quite different, which requires custom handling in the library.
+Therefore there are some modules, which are "natively" supported in the library - and others, which may work and may not.
+
+See more on the [project page on GitHub](https://github.com/MarketSquare/Robotframework-Database-Library).
+"""
 
 version_file = join(dirname(abspath(__file__)), 'src', 'DatabaseLibrary', 'version.py')
 
@@ -34,6 +89,8 @@
 setup(name         = 'robotframework-databaselibrary',
       version      = VERSION,
       description  = 'Database utility library for Robot Framework',
+      long_description=long_description,
+      long_description_content_type="text/markdown",
       author       = 'Franz Allan Valencia See',
       author_email = '[email protected]',
       url          = 'https://github.com/MarketSquare/Robotframework-Database-Library',