New app which use NC Deck API

I want to intregrate an app which use Nextcloud Deck API. This app needs to add a new card if a email it’s received to a specified address. I wrote the code, but i don’t know how to integrate to make an available NC app.
Can anyoane send me a documentation or any advice ?

The Deck API is documented here:

If you want to publish it on the Nextcloud App Store, you can take a look here: