Merge pull request #360 from tracim/fix/359/website_base_url_in_readme

README.md

     gearbox serve --reload --debug
 
 You can now enter the application at
-[http://localhost:8080](http://localhost:8080) and login with admin user:
+[http://127.0.0.1:8080](http://127.0.0.1:8080) and login with admin user:
 
  * user : `admin@admin.admin`
  * password : `admin@admin.admin`