Misc README improvements

README.md

@@ -1,15 +1,24 @@
-# <img alt="YunoHost" src="https://raw.githubusercontent.com/YunoHost/doc/master/images/logo_roundcorner.png" width="100px" />
+<p align="center">
+    <img alt="YunoHost" src="https://raw.githubusercontent.com/YunoHost/doc/master/images/logo_roundcorner.png" width="100px" />
+</p>
+
+<h1 align="center">YunoHost</h1>
+
+<div align="center">
 
 [![Build status](https://travis-ci.org/YunoHost/yunohost.svg?branch=stretch-unstable)](https://travis-ci.org/YunoHost/yunohost)
 [![GitHub license](https://img.shields.io/github/license/YunoHost/yunohost)](https://github.com/YunoHost/yunohost/blob/stretch-unstable/LICENSE)
 [![Mastodon Follow](https://img.shields.io/mastodon/follow/28084)](https://mastodon.social/@yunohost)
 
+</div>
+
+YunoHost is an operating system aiming to simplify as much as possible the administration of a server.
+
 This repository corresponds to the core code of YunoHost, mainly written in Python and Bash.
 
-You can learn more about what's YunoHost and its features [here](https://yunohost.org/#/whatsyunohost)!
-
+- [Project features](https://yunohost.org/#/whatsyunohost)
 - [Project website](https://yunohost.org)
-- [Installation documentation](https://yunohost.org/install)
+- [Install documentation](https://yunohost.org/install)
 - [Issue tracker](https://github.com/YunoHost/issues)
 
 # Screenshots
@@ -22,6 +31,7 @@ Webadmin ([Yunohost-Admin](https://github.com/YunoHost/yunohost-admin)) | Single
 ## Contributing
 
 - You can learn how to get started with developing on YunoHost by reading [this piece of documentation](https://yunohost.org/dev).
+- Come chat with us on the [dev chatroom](https://yunohost.org/#/chat_rooms) !
 - You can help translate YunoHost on our [translation platform](https://translate.yunohost.org/engage/yunohost/?utm_source=widget)
 
 <img src="https://translate.yunohost.org/widgets/yunohost/-/multi-auto.svg" alt="Translation status" />