docs: updated badges

README.md

 ![Wiki.js](https://raw.githubusercontent.com/Requarks/wiki-site/1.0/assets/images/logo.png)
 
-[![Release](https://img.shields.io/github/release/Requarks/wiki.svg?style=flat-square&maxAge=3600)](https://github.com/Requarks/wiki/releases)
-[![License](https://img.shields.io/badge/license-AGPLv3-blue.svg?style=flat-square)](https://github.com/requarks/wiki/blob/master/LICENSE)
+[![Release](https://img.shields.io/github/release/Requarks/wiki.svg?style=flat&maxAge=3600)](https://github.com/Requarks/wiki/releases)
+[![License](https://img.shields.io/badge/license-AGPLv3-blue.svg?style=flat)](https://github.com/requarks/wiki/blob/master/LICENSE)
 [![Backers on Open Collective](https://opencollective.com/wikijs/backers/badge.svg)](#backers)
 [![Sponsors on Open Collective](https://opencollective.com/wikijs/sponsors/badge.svg)](#sponsors)
-[![npm](https://img.shields.io/badge/npm-wiki.js-blue.svg?style=flat-square)](https://www.npmjs.com/package/wiki.js)
-[![Downloads](https://img.shields.io/github/downloads/Requarks/wiki/total.svg?style=flat-square)](https://www.npmjs.com/package/wiki.js)
+[![npm](https://img.shields.io/badge/npm-wiki.js-blue.svg?style=flat)](https://www.npmjs.com/package/wiki.js)
+[![Downloads](https://img.shields.io/github/downloads/Requarks/wiki/total.svg?style=flat)](https://www.npmjs.com/package/wiki.js)
 [![Docker Pulls](https://img.shields.io/docker/pulls/requarks/wiki.svg)](https://hub.docker.com/r/requarks/wiki/)  
 ![Build Status](https://requarks.visualstudio.com/_apis/public/build/definitions/5850c090-02b9-4312-b4ce-0e1f5677b574/6/badge)
-[![Codacy Badge](https://img.shields.io/codacy/grade/1d0217a3153c4595bdedb322263e55c8/master.svg?style=flat-square)](https://www.codacy.com/app/Requarks/wiki)
-[![Standard - JavaScript Style Guide](https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat-square)](http://standardjs.com/)
-[![Chat on Gitter](https://img.shields.io/badge/chat-on_gitter-CC2B5E.svg?style=flat-square&logo=image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAcAAAAOCAMAAADUg/YpAAAABlBMVEUAAAD///%2Bl2Z/dAAAAAXRSTlMAQObYZgAAABVJREFUeAFjwAUYYTQByAAh0WicAAAFnwAYeB5bLwAAAABJRU5ErkJggg==)](https://gitter.im/Requarks/wiki)
-[![Twitter Follow](https://img.shields.io/badge/follow-%40requarks-blue.svg?style=flat-square)](https://twitter.com/requarks)
+[![Codacy Badge](https://img.shields.io/codacy/grade/1d0217a3153c4595bdedb322263e55c8/master.svg?style=flat)](https://www.codacy.com/app/Requarks/wiki)
+[![Standard - JavaScript Style Guide](https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat)](http://standardjs.com/)
+[![Chat on Gitter](https://img.shields.io/badge/chat-on_gitter-CC2B5E.svg?style=flat&logo=image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAcAAAAOCAMAAADUg/YpAAAABlBMVEUAAAD///%2Bl2Z/dAAAAAXRSTlMAQObYZgAAABVJREFUeAFjwAUYYTQByAAh0WicAAAFnwAYeB5bLwAAAABJRU5ErkJggg==)](https://gitter.im/Requarks/wiki)
+[![Twitter Follow](https://img.shields.io/badge/follow-%40requarks-blue.svg?style=flat)](https://twitter.com/requarks)
 
 ##### A modern, lightweight and powerful wiki app built on NodeJS, Git and Markdown
 
@@ -26,6 +26,7 @@
 - [Chat with us](#gitter)
 - [Translations](#translations) *(We need your help!)*
 - [Special Thanks](#special-thanks)
+- [Contribute](#contributors)
 
 ## Requirements