We have ansible modules (https://github.com/dokku/ansible-dokku) that cover the majority of app management if thats what you want. The reason I am hesitant to do it in something like `app.json` is purely because one might expose Dokku to users who only have push access and some of those commands can be fairly destructive.
I’d love this feature too. Why not add it as an optional thing to enable and let users decide? Maybe just put a big warning in the docs and make it opt-in?
I really hate adding knobs - it increases the amount of work I need to do to maintain and support the project.
Long term, I'd like to port the ansible modules over to being maintained internally by the dokku/omakase project, and then maybe that could be a plugin that folks could run from within their deploy.
Disclaimer: I am the Dokku maintainer.