To integrate it in a MiSTer device, add the following section to the end of to the file downloader.ini that should be placed at the root of the SD (if it doesn't exist, you may create it for this purpose):
[MikeS11/YC_Builds-MiSTer]
db_url = https://raw.githubusercontent.com/MikeS11/YC_Builds-MiSTer/db/db.json.zipAfter that, run downloader or update_all as usual. It will try to fetch the files from your newly created database. If your database is still empty -which is your case if you followed these instructions-, obviously it won't download any file yet, but it will show up in the logs. For adding files to the database check the next section.