Modrinth: Add Separate Mod List File

[Allexio]

Hey there, thanks for the amazing work 😄

Context:

You want to download individual mods from modrinth, but there's a fair amount of them so it looks "unclean" to list them in the docker compose

Proposed solution:

Ability to specify a file in the docker compose such as:
MODRINTH_PROJECT_FILE: "./my_mod_file.csv"

The csv would then contain a list of mods (same as what you would have for MODRINTH_PROJECTS) that the server can download.

This is clearly a "could have" QoL feature, not at all a priority.

Still, thank you for considering it.