The official invitation
The invitation is discord.gg/CkJTzP9bje and it does not expire. It is published on the official contacts page together with a QR code you can scan or download.
Joining from a phone
Tap the Discord button on the contacts page. If the Discord app is installed it opens directly on the invitation; if not, you will be asked to install it or continue in the browser.
Joining from a computer
Open the same link in a browser. You can join through Discord Web without installing anything.
Using the QR code
The QR code on the contacts page is generated from the invitation link above - it is not a picture taken from somewhere else. Point your phone camera at it and follow the prompt, or download the image and scan it later.
A note on invitations you did not get from this site
Discord invitations are easy to fake because they all look alike. If someone sends you a ZEEFLIX invitation privately, compare it with the one on this page before you join.