Add readme web badge

Author: Simon Schubert

README.md

@@ -6,8 +6,8 @@ The app currently has **6775** manual pages, **22+** basic categories and a bunc
 
 [![Play Store](https://raw.githubusercontent.com/SimonSchubert/LinuxCommandBibliotheca/master/art/play_store_badge.png)](https://play.google.com/store/apps/details?id=com.inspiredandroid.linuxcommandbibliotheca)
 [![F-Droid](https://raw.githubusercontent.com/SimonSchubert/LinuxCommandBibliotheca/master/art/fdroid_badge.png)](https://f-droid.org/en/packages/com.inspiredandroid.linuxcommandbibliotheca/)
+[![F-Droid](https://raw.githubusercontent.com/SimonSchubert/LinuxCommandBibliotheca/master/art/web_badge.png)](https://linuxcommandlibrary.com)
 
-https://linuxcommandlibrary.com
 
 ### Mobile screenshots