Added Helm utility container

helm/Dockerfile

@@ -0,0 +1,22 @@
+FROM gcr.io/cloud-builders/kubectl 
+
+LABEL "name"="Helm"
+LABEL "maintainer"="Unacast <developers+github@unacast.com>"
+LABEL "version"="1.0.0"
+
+LABEL "com.github.actions.name"="Helm"
+LABEL "com.github.actions.description"="Helm"
+LABEL "com.github.actions.icon"="terminal"
+LABEL "com.github.actions.color"="orange"
+
+ENV HELM_VERSION="v2.14.1"
+
+RUN curl -Lo /tmp/helm-linux-amd64.tar.gz https://storage.googleapis.com/kubernetes-helm/helm-${HELM_VERSION}-linux-amd64.tar.gz \
+    && tar -xvf /tmp/helm-linux-amd64.tar.gz -C /tmp/ \
+    && mv /tmp/linux-amd64/helm /usr/local/bin/ \ 
+    && chmod +x /usr/local/bin/helm  && rm -rf /tmp/linux-amd64 \
+    && helm init --client-only 
+
+COPY entrypoint.sh /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]
+

helm/Makefile

@@ -0,0 +1,18 @@
+include ../docker.mk
+include ../help.mk
+include ../shell.mk
+
+.PHONY: clean
+clean: ## Clean up after the build process.
+
+.PHONY: lint
+lint: docker-lint ## Lint all of the files for this Action.
+
+.PHONY: build
+build: docker-build ## Build this Action.
+
+.PHONY: test
+test: ## Test the components of this Action.
+
+.PHONY: publish
+publish: docker-publish ## Publish this Action.

helm/entrypoint.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+set -e
+
+sh -l -c "helm $*"