fix: install curl in builder stage for temurin:25-jdk

eclipse-temurin:25-jdk no longer ships curl; add an explicit
apt-get install before the Node.js download step.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: coopernetes

Dockerfile

@@ -6,6 +6,8 @@ FROM docker.io/eclipse-temurin:25-jdk@sha256:c3a5cfd77c9a43dd95269a266290d365b79
 # Install Node.js directly from the official distribution with SHA256 verification.
 # To update: download the new tarball, verify against nodejs.org/dist/vX.Y.Z/SHASUMS256.txt,
 # and update both NODE_VERSION and NODE_SHA256 below.
+RUN apt-get update && apt-get install -y --no-install-recommends curl && rm -rf /var/lib/apt/lists/*
+
 ARG NODE_VERSION=24.15.0
 ARG NODE_SHA256_AMD64=44836872d9aec49f1e6b52a9a922872db9a2b02d235a616a5681b6a85fec8d89
 ARG NODE_SHA256_ARM64=73afc234d558c24919875f51c2d1ea002a2ada4ea6f83601a383869fefa64eed