Nextcloud 15 recommends 'imagick' to be installed

[rcdailey]

I get this message using Nextcloud 15 apache container:

This instance is missing some recommended PHP modules. For improved performance and better compatibility it is highly recommended to install them.

• imagick

Can this be added to the image?

[J0WI]

Looks like the thumbnail generation fails because of this. Thanks for the heads up!

[kesselb]

Ref nextcloud/server#12821

FYI: Imagick is recommended when the theming app is enabled.