Many people have moved to a new discord called New Tanaan.
https://discord.com/invite/9yd6tg9msD
That should be an invite link as it was posted on discord. If not you can still go to the old discord, scroll through the messages and find a link there as well.
The documentation and tooling are being preserved as much as possible.
https://docs.eqemu.dev/
https://gitlab.com/TheGrandLibrary