Build WebP and AVIF support into Docker images

[aentwist]

User Story

I am working on adding WebP and AVIF preview support to Nextcloud nextcloud/server#13552. I need support for these.

Proposed Solution

Install WebP and AVIF in the images for which the PHP version supports each (that is, GD supports?).

I think this is what is required (not sure, brand new to PHP):

• install libwebp-dev
• install libavif-dev libaom-dev libdav1d-dev (taken directly from the below project's script, consider just libavif-dev if possible)
• configure GD --with-webp --with-avif

Alternative Considerations

• docker-php-extension-installer - less work for you, looks like a great project
• do not remove the source lists in your Docker image, so I can install the dang things myself

Notes

The official images already have WebP.

See https://github.com/nextcloud/docker/blob/3eb80c52b129b4fbe8bd041fd0ba3ee0262e823a/Dockerfile-debian.template#L41
and https://github.com/nextcloud/docker/blob/3eb80c52b129b4fbe8bd041fd0ba3ee0262e823a/Dockerfile-debian.template#L47

[juliusknorr]

I'd be glad to add that. Would you be up for opening a pull request?

[aentwist]

Yeeep guess so. I should be able to get around to it tomorrow.

[aentwist]

Note that this might not be deployed. For up-to-date deployment information see Packages.

I built the image locally and updated my Compose file to reference it instead of the deployed image before this was even merged, so I am not blocked.