you can only attach a single volume to a single service

ohh

and how do i configure if there are 2 paths (subfolders) but a single volume

    volumes:
      - ./config:/app/config
      - ./assets:/app/assets

mount volume to /app/data and have the app store the files into /app/data/config and /app/data/assets

so if I set a volume to /app/data how would the sub-folders will create

didn't get you about /app/data/config and /app/data/assets

The volume is a folder mounted at /app/data. Any subfolders are also contained within that volume

You can create those folders using a filebrowser template, or have your program create them on startup if they don’t already exist

so you mean i can also have 2 services in one template, one for my app and one for filebrowser which i can use for creating subfolders

If you're creating a template, you shouldn't need filebrowser. Your app should automatically create the subfolders it needs

!s