This project used socketio which I m not really a fan of rightnow, it also had its quirks and flaws so I rewrote it, check it out at lyric-server
Compile with:
yarn run tsc
Install with:
cp dist/LyricServer.js ~/.config/spicetify/Extensions/
Add host by adding your ip:port to recievers list(default localhost:5000)
Enable extension:
spicetify config extensions LyricServer.js
spicetify apply