Use pre-built image for workflow speedup

Dockerfile

@@ -1,20 +1 @@
-FROM flownative/base:1
-
-ENV HELM_VERSION v3.0.2
-ENV HELM_HOME=/root/.helm
-
-# We need Git for "helm plugin install"
-RUN apt-get update \
-    && apt-get install git \
-    && rm -rf /var/lib/apt/lists/* \
-    && rm -rf /var/log/apt \
-    && rm -rf /var/log/dpkg.log
-
-RUN curl -sSL https://get.helm.sh/helm-${HELM_VERSION}-linux-amd64.tar.gz | tar xz \
-    && mv linux-amd64/helm /usr/local/bin/helm \
-    && rm -rf linux-amd64
-
-COPY entrypoint.sh /entrypoint.sh
-RUN chmod 755 /entrypoint.sh
-
-ENTRYPOINT ["/entrypoint.sh"]
+FROM flownative/action-helm-release:1

README.md

@@ -51,3 +51,10 @@ jobs:
           repository_user: '${{ secrets.CHARTMUSEUM_USER }}'
           repository_password: '${{ secrets.CHARTMUSEUM_PASSWORD }}'
 ````
+
+## Implementation Note
+
+The repository of this action does not contain the actual implementation code. Instead, it's referring to a pre-build
+image in its `Dockerfile` in order to save resources and speed up workflow runs.
+
+The code of this action can be found [here](https://github.com/flownative/docker-action-helm-release).