Add `curl` to redis docker image

[guoard]

Redis Sentinel mode includes a configuration option that allows notifications (to an administrator or client) when a failover occurs. This feature is documented in the sentinel.conf.

When attempting to utilize this notification feature, I encountered a problem: curl is not installed in the image. I also attempted to use wget to send an HTTP request, but the wget included with busybox cannot handle HTTPS proxies.

Could curl be added to the redis docker image? This would enable the notification feature to function correctly by allowing HTTP requests to be sent reliably.

Thank you!

[adamiBs]

Did you attempt to use the image as the base image, and customize it?

[guoard]

@adamiBs Yes, I did try using the official image as a base and adding curl, but maintaining a custom image adds overhead. We’d need to rebuild and test it with every Redis release, ensure multi-arch compatibility, and manage the CI/CD pipeline for it.

Including curl in the official image would make Sentinel's notification feature usable out of the box, with minimal added weight. It’s a small change that would simplify things for many users.

Thanks for considering it!