I'd like to add a "Deploy to Heroku" button to my application hosted on GitHub, but the only problem is it requires env variables to run, and will require the user to enter them before it will work. Is there a way in the app.json schema to prompt the user prior to install to set these up? Or is my best bet setting them to a standard string such as "replace_me" and telling the users to enter their data from there in my readme file.
I saw that you could generate a "secret" in their documentation but I'm not sure if that's what I'm looking for.