better README h1 for SEO

README.md

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+# GrandNode : Free and Open Source Ecommerce #
+
 [![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=HFRGJMMY9KF7C)   [![Gitter chat](https://badges.gitter.im/gitterHQ/gitter.png)](https://gitter.im/grandnode/Lobby)   [![Build status](https://ci.appveyor.com/api/projects/status/ox0qebg3wv3dp30e/branch/develop?svg=true)](https://ci.appveyor.com/project/KrzysztofPajak/grandnode/branch/develop)   [![Build Status](https://travis-ci.org/grandnode/grandnode.svg?branch=develop)](https://travis-ci.org/grandnode/grandnode)   [![Codacy Badge](https://api.codacy.com/project/badge/Grade/acbd143050984c1983d7cb0bd10b3472)](https://www.codacy.com/app/grandnode/grandnode?utm_source=github.com&utm_medium=referral&utm_content=grandnode/grandnode&utm_campaign=Badge_Grade)   ![Github All Releases](https://img.shields.io/github/downloads/grandnode/grandnode/total.svg) [![Demo](https://img.shields.io/badge/DEMO-HERE-green.svg)](https://demo.grandnode.com/)
 
 Thank you for choosing GrandNode! It's an open source, free, cross-platform e-commerce software based on ASP.NET Core 2.2 and MongoDB - NoSQL database. You can run it on Linux, Windows and MacOS easily. GrandNode also supports Docker, so you are able to install it just in a seconds with Docker.