I was searching around on discord for a P5.js and/or WEBGL server and I couldn’t find one so I thought I’d make my own.
It’s currently a slowly-growing community, still very incomplete.
If you are interested in this topic, don’t delay in joining the official P5.js & WEBGL Discord!
It’s nice that you take initiative but be careful when you use the word “official” - it means the server is somehow maintained by the processing foundation and not sure if that is the case. Of course that doesn’t stop you from organizing something like this 
by the way the invite seems expired and you may want to generate a new link with no expiration.
There are some relevant servers:
I’m not in the loop but if you look for demoscene, for example, there are active servers for shaders (including webgl) on discord.
Okay, that makes a lot of sense. Thanks for pointing those stuff out.
Hi, the ml5.js server says invitation expired, could you send that again?
Thank you!