SOLR-17908 Add (back) cURL to docker image

[janhoy]

After upgrading to a new default docker image with JRE 25 for the upcoming 10.x release (#3782), @epugh discovered that it does no longer have cURL installed by default. That's a bummer, since everyone ❤️ cURL.

This may be the smallest PR I've written in a long time :)

[Copilot]

Pull Request Overview

This PR adds the curl package back to the Solr Docker image after it was inadvertently removed during the upgrade to JRE 25 for the 10.x release.

Key Changes:

• Adds curl to the list of installed packages in the Dockerfile template

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[epugh]

Heart curl! I like we have wget as well.

[dsmiley]

Why do we also have wget? Can't we just pick one (curl)?

[epugh]

Why do we also have wget? Can't we just pick one (curl)?

I debated the same thing. I think some folks like curl and some like wget.

[janhoy]

Why do we also have wget? Can't we just pick one (curl)?

If wget is in base image we could uninstall but it would not save image size. I think curl is worth it for its familiarity in local debugging.

In a distant future perhaps we get to minimal base image and jlink..

[dsmiley]

I'm not arguing for uninstallation but for removing where we ask for it, assuming we don't actually need it.