ci: Remove helm validation action in favour of helm kubeval directly

.github/workflows/helm_validation.yaml

@@ -1,14 +0,0 @@
-name: Helm Validation
-
-on: [pull_request, issues]
-
-jobs:
-  validate:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout Repo
-        uses: actions/checkout@v2
-      - name: Kubeval Helm Chart
-        uses: junior/kubeval-helm-chart-action@0.2.0-alpha.0
-        env:
-          INPUT_KUBERNETES_VERSION: 1.19

ci/dev/lint.sh

@@ -8,6 +8,7 @@ main() {
   stylelint $(git ls-files "*.css")
   tsc --noEmit
   shellcheck -e SC2046,SC2164,SC2154,SC1091,SC1090,SC2002 $(git ls-files "*.sh")
+  helm kubeval ci/helm-chart
 }
 
 main "$@"

ci/images/debian10/Dockerfile

@@ -45,4 +45,10 @@ ENV GO111MODULE=on
 RUN go get mvdan.cc/sh/v3/cmd/shfmt
 RUN go get github.com/goreleaser/nfpm/cmd/nfpm
 
+RUN VERSION="$(curl -fsSL https://storage.googleapis.com/kubernetes-release/release/stable.txt)" && \
+    curl -fsSL "https://storage.googleapis.com/kubernetes-release/release/$VERSION/bin/linux/amd64/kubectl" > /usr/local/bin/kubectl \
+    && chmod +x /usr/local/bin/kubectl
+RUN curl -fsSL https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash
+RUN helm plugin install https://github.com/instrumenta/helm-kubeval
+
 RUN curl -fsSL https://get.docker.com | sh