Hello :)

First of all, I'd like to thank you for this awesome open source project, it's amazing!

In August 2020, Chrome will be able to show AVIF images.

Source: https://chromium-review.googlesource.com/c/chromium/src/+/2276542

Because libvips already support AVIF format, it could be nice to add this format in weserv project, what do you think?

Have a great day,
Maxime