General Workflow: Heroku deploy button

[manishapriya94]

It would be super useful if we could get a Deploy to Heroku button in the Readme which would enable users to easily deploy DemocracyOS to a Heroku instance without ever leaving the web browser. And with just a little configuration on the users end they'll have something running almost instantly.

I propose the button because it is ideal for communities who need to make decisions quickly with the flexibility of something like Heroku.

More about Heroku deploy buttons here, https://devcenter.heroku.com/articles/heroku-button .

An example button which currently lacks the required setup files: