fix(docker): use multi-stage build to install curl (quarkus-micro-image:2.0 ships no microdnf)

The 2.0 rebuild of quarkus-micro-image removed microdnf to slim the image,
so the inline 'microdnf install curl-minimal' step now fails with
'command not found'.

Build curl-minimal in a ubi9/ubi-minimal builder stage, then copy only the
curl binary + its runtime shared libs + CA bundle into the final
quarkus-micro-image layer. Final image stays slim and the docker-compose
healthcheck keeps working.

Dockerfile

@@ -1,9 +1,19 @@
+FROM registry.access.redhat.com/ubi9/ubi-minimal AS curl-builder
+RUN microdnf install -y curl-minimal && microdnf clean all \
+ && mkdir -p /out \
+ && install -m 0755 /usr/bin/curl /out/usr/bin/curl \
+ && for lib in $(ldd /usr/bin/curl | awk '/=>/ {print $3}' | sort -u); do \
+      install -D -m 0755 "$lib" "/out$lib"; \
+    done \
+ && cp -rP /etc/pki/ca-trust /out/etc/pki/ \
+ && cp -rP /etc/ssl /out/etc/
+
 FROM quay.io/quarkus/quarkus-micro-image:2.0
 WORKDIR /work/
 COPY build-output/shot-crafter-calculator-1.0.0-runner /work/application
+COPY --from=curl-builder /out/ /
 
-RUN microdnf install -y curl-minimal && microdnf clean all \
-  && chmod 775 /work /work/application \
+RUN chmod 775 /work /work/application \
  && chown -R 1001 /work \
  && echo "securerandom.source=file:/dev/urandom" >> /work/application