Docker - Where to find dockerfile?

Question

Docker

Sorry for the noob questions...
I need to edit and run this image a bit.
I downloaded the image
docker pull chocobozzz/peertube
. Where can I find the dockerfile config itself in order to change its settings (logins, passwords for the database, as well as data storage paths)?

Answer 1

https://hub.docker.com/r/chocobozzz/peertube/dockerfile