update features

README.md

@@ -12,6 +12,7 @@ This is a URL shorter written in Python with Flask als Webhandler. The Webserver
 * account system based on google and github oauth (user can view and delete his links)
 * qr code generation after link is shorten
 * easy deployment
+* can run in offline enviorements, because no online files needed (behind a firewall)
 
 #### Why is this one better than other
 * no ADs
@@ -22,6 +23,7 @@ This is a URL shorter written in Python with Flask als Webhandler. The Webserver
 * posibility to use multiple domains
 * open source --> posibility to expand
 * very small and leightweight (at the moment the sourcecode is about 2mb)
+* can be used in offline enviorements, because no online files needed (behind a firewall)
 
 [![pipeline status](http://gitlab.jonasled.de/jonasled/url_shorter_docker/badges/master/pipeline.svg)](http://gitlab.jonasled.de/jonasled/url_shorter_docker/commits/master)