fix(zig): add curl and ca-certificates packages to zig-0.15.2 Dockerfile

[mal1k-me]

Problem

The zig-0.15.2.Dockerfile fails during Docker build because curl and ca-certificates are not installed, but the RUN command on line 15 uses curl to download the Zig compiler over HTTPS.

Error Output

#9 [3/8] RUN curl -O https://ziglang.org/download/0.15.2/...
#9 0.455 /bin/sh: 1: curl: not found
#9 ERROR: exit code: 127

After adding curl alone:

#9 0.321 curl: (77) error setting certificate file: /etc/ssl/certs/ca-certificates.crt

Root Cause

When the Dockerfile was updated from Alpine to Debian Trixie in commit 6288895, the curl and ca-certificates packages were inadvertently omitted. Alpine includes these by default, but Debian requires explicit installation.

Solution

Add curl and ca-certificates to the apt-get install command with pinned versions:

• ca-certificates=20250419 (latest for Debian Trixie)
• curl=8.14.1-2+deb13u2 (matches other pinned package versions)

Testing

Tested locally with a CodeCrafters shell challenge:

• Before fix: Build fails with "curl: not found"
• After fix: Build succeeds, Zig downloads and installs correctly, zig version returns 0.15.2

Impact

This fix enables all Zig 0.15.2 users to successfully build their CodeCrafters projects without manual Dockerfile modifications.

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Note: This issue was discovered while building a local testing tool for CodeCrafters challenges, with assistance from a coding agent during real-world Zig project testing.