This has been open since at least November 2017, let's use it
https://discord.gg/NCM8Sqq
The link will not expire
You can just bookmark this URL after you join:
https://discordapp.com/channels/378829250637201408/378829250637201411
There's only 10 people there currently
You don't need to download the app, you can use the website, it's the same thing
There's also mobile apps for it