Minor Dockerfile an CI file fixes

.gitlab-ci.yml

@@ -898,7 +898,8 @@ deploy-buildimage-k3d-helm:
     - .kaniko-push
   needs: []
   variables:
-    BUILD_ARG_DOCKER_VERSION: 20.10.12
+    DOCKER_VERSION: 20.10.12
+    BUILD_ARG_DOCKER_VERSION: $DOCKER_VERSION
     BUILD_ARG_KUBECTL: v1.21.3
     IMAGE_NAME: theodolite-build-k3d-helm
     IMAGE_TAG: $DOCKER_VERSION

buildimages/k3d-helm/Dockerfile

@@ -8,7 +8,6 @@ RUN apk add -U wget bash openssl
 # install kubectl
 RUN wget -q -O /usr/local/bin/kubectl https://storage.googleapis.com/kubernetes-release/release/${KUBECTL_VERSION}/bin/linux/amd64/kubectl && \
     chmod +x /usr/local/bin/kubectl
-RUN echo https://storage.googleapis.com/kubernetes-release/release/${KUBECTL_VERSION}
 # install k3d
 RUN wget -q -O - https://raw.githubusercontent.com/rancher/k3d/main/install.sh | bash
 # install Helm