I just saw that the github user bambanah seems to has started to continue the development of deemix!!

There’s now a docker image you can use too.

Reddit link with more info about it: https://web.archive.org/web/20250114172700/https://old.reddit.com/r/Piracy/comments/1g5nar6/deezer_downloader_deemix_has_been_revived_on/

I see many posts about piracy services closing down, so maybe this post gives some hope:)