Carbone with docker compose

[paulsen-it]

I have installed carbone via Docker Compose as in the documentation and it works so far. But now there is a problem, I want to fill a TXT template with json data and get it back as a TXT file, all line feeds are removed and I wanted to use a custom formatter to insert these line breaks as a solution. But now I have the problem that I can't find a place where I have to put my ownFunctions.js so that carbone reads my own formatter.
I also have no access to certain directories, as the user Carbone is used in the container and the default root password is nowhere to be found.