Add helmfile installation and application to k8s workflow

The kind-cluster workflow within GitHub workflows has been updated to include the steps of installing and applying a helmfile. The README file was also updated to reflect the proper Helmfile repository link. This addition ensures helmfile's availability and improves the workflow's functionality in the k8s-dev-cluster project.

.github/workflows/kind-cluster.yml

@@ -25,4 +25,15 @@ jobs:
       - name: Verify kind cluster
         run: |
           kubectl cluster-info
-          kubectl get nodes
+          kubectl get nodes
+
+      - name: install helmfile
+        run: |
+          curl -LO https://github.com/helmfile/helmfile/releases/download/v0.159.0/helmfile_0.159.0_darwin_amd64.tar.gz
+          tar -xzvf helmfile_0.159.0_darwin_amd64.tar.gz
+          sudo mv helmfile /usr/local/bin
+          helmfile --version
+
+      - name: apply helmfile
+        run: |
+          helmfile --file ./helm sync

README.md

@@ -9,7 +9,7 @@ Deploy a local kubernetes cluster for development purpose. This repository conta
 
 - [Docker](https://docs.docker.com/get-docker/)
 - [Kind](https://kind.sigs.k8s.io/docs/user/quick-start/#installation)
-- [Helmfile](https://github.com/roboll/helmfile)
+- [Helmfile](https://github.com/helmfile/helmfile)
 
 ## Usage