fix: adding missing helm in image

Signed-off-by: Steven Wade <[email protected]>

Author: swade1987

Dockerfile

@@ -8,6 +8,10 @@ ARG KUSTOMIZE=5.6.0
 RUN curl -sL https://github.com/kubernetes-sigs/kustomize/releases/download/kustomize%2Fv${KUSTOMIZE}/kustomize_v${KUSTOMIZE}_linux_amd64.tar.gz | \
 tar xz && mv kustomize /usr/local/bin/kustomize
 
+ARG HELM_V3=3.17.1
+RUN curl -sSL https://get.helm.sh/helm-v${HELM_V3}-linux-amd64.tar.gz | \
+tar xz && mv linux-amd64/helm /usr/local/bin/helmv3 && rm -rf linux-amd64 && ln -s /usr/local/bin/helmv3 /usr/local/bin/helm && helm version
+
 RUN rm -rf /var/cache/apk/*
 
 COPY kustdiff /kustdiff