I just made my first web app with Sinatra. It is a REST API that helps people add two-step verification to their websites or apps. I am a complete noob in web development so please criticize me and let me know how shitty this whole thing is. :)
I am sorry but what do you mean by modified email? I used sinatra(http://www.sinatrarb.com/) to build the web service and ruby for back-end. It is hosted on heroku. :)
https://devcenter.heroku.com/articles/getting-started-with-r...