Example site is offline

[caioramosps]

This link is offline http://rad-example.herokuapp.com/

[rakvium]

@caioramosps it might be connected to commit b65559c0af2ad50d2847d16966aab4a560a934b0 that removed :json from format configuration for the example project, though commit ab3c6b7e9192ae874b471a47befcd0ea89c4c9ac suggests that :json option is safe to be added back after #382 is resolved.

Adding :json option back locally worked fine, thus created a pull request: https://github.com/zipmark/rspec_api_documentation/pull/501