Added CodeFactor Badge to WebApp

Author: Gimleux

README.md

@@ -1,7 +1,8 @@
 # WebApp
 Frontend Web Application for FileFighter.  
 ![Latest Release](https://github.com/FileFighter/WebApp/workflows/Latest%20Release/badge.svg)
-![Stable Release](https://github.com/FileFighter/WebApp/workflows/Stable%20Release/badge.svg)  
+![Stable Release](https://github.com/FileFighter/WebApp/workflows/Stable%20Release/badge.svg)
+![CodeFactor](https://www.codefactor.io/repository/github/filefighter/webapp/badge)  
 ![Docker Release](https://img.shields.io/github/v/release/filefighter/webapp?color=dark-green&label=Stable%20Version&logo=docker&style=for-the-badge)
 ![Docker Pulls](https://img.shields.io/docker/pulls/filefighter/frontend?logo=docker&style=for-the-badge)