feat(koolbox): Add changelog genrator and release-cli

This patch prepares the usage of koolbox as release CI image.

images/koolbox/.release

-release=0.1.0
+release=0.2.0

images/koolbox/Dockerfile

@@ -14,6 +14,12 @@ RUN curl -LO "https://dl.k8s.io/release/${KUBECTL_VERSION}/bin/linux/amd64/kubec
     && install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl \
     && install -o root -g root -m 0755 kubectl-convert /usr/local/bin/kubectl-convert
 
+# Release CLI cache
+FROM registry.gitlab.com/gitlab-org/release-cli:latest@sha256:af74927a13c44668cf3741a8e3ef513cd4353703707c64b51b6f6ea98d3fefaf as release-cli
+
+# git-chglog cache
+FROM quay.io/git-chglog/git-chglog:0.15.1 as git-chglog
+
 # Helm CLI cache
 FROM registry.fedoraproject.org/fedora:35 as helm
 
@@ -156,6 +162,8 @@ COPY --from=sops /usr/local/bin/sops /usr/local/bin/sops
 COPY --from=yq /usr/local/bin/yq /usr/local/bin/yq
 COPY --from=kubectl-krew /opt/krew/krew /usr/local/bin/kubectl-krew
 COPY --from=mdbook /usr/local/bin/mdbook /usr/local/bin/mdbook
+COPY --from=release-cli /usr/local/bin/release-cli /usr/local/bin/release-cli
+COPY --from=git-chglog /usr/local/bin/git-chglog /usr/local/bin/git-chglog
 
 RUN true \
     && echo "command -v kubectl-krew >/dev/null && export PATH=\"${KREW_ROOT:-$HOME/.krew}/bin:$PATH\"" >> /root/.bashrc \