How to set ssh keys for heroku?

Question

JavaScript

I follow these guides:
https://devcenter.heroku.com/articles/keys
https://devcenter.heroku.com/articles/git
When I do
git push heroku master https://devcenter.heroku.com/articles/git#deployin.. .Produces
the following

And I can not understand what he does not like

Answer 1

The whole trouble was that I was trying to deploy one file for educational purposes. And it was necessary to deploy the project.