add kubectl to dapper

Signed-off-by: Alexandre Lamarre <[email protected]>

Dockerfile.dapper

@@ -37,6 +37,9 @@ RUN if [ "${ARCH}" != "s390x" ]; then \
         chmod +x /usr/local/bin/mc; \
     fi
 RUN curl --fail https://raw.githubusercontent.com/k3d-io/k3d/main/install.sh | TAG=v5.4.6 K3D_INSTALL_DIR="/usr/local/bin" bash 
+RUN curl -LO --fail "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/${ARCH}/kubectl" && \
+    chmod +x kubectl && \
+    mv kubectl /usr/local/bin/kubectl
 
 ENV DAPPER_ENV REPO TAG DRONE_TAG CROSS CROSS_ARCH USE_DOCKER_BUILDX
 ENV DAPPER_SOURCE /go/src/github.com/rancher/backup-restore-operator/