Add version flag

Author: kvaps

kubectl-build

@@ -3,6 +3,7 @@ set -e
 export DOCKER_CONFIG=${KUBECTL_BUILD_DOCKER_CONFIG:-${DOCKER_CONFIG:-$HOME/.docker/config.json}}
 export KUBECONFIG="${KUBECTL_BUILD_KUBECONFIG:-$KUBECONFIG}"
 kubectl=kubectl
+version=1.6.0
 image="${KUBECTL_BUILD_IMAGE:-ghcr.io/kvaps/kaniko-executor:v1.6.0}"
 name="${KUBECTL_BUILD_NAME_OVERRIDE:-kaniko-$(env LC_ALL=C tr -dc a-z0-9 </dev/urandom | head -c 6)}"
 context=""
@@ -19,6 +20,10 @@ while [ $# -gt 0 ]; do
   key="$1"
 
   case $key in
+  -v | --version)
+    echo "kubectl-build $version"
+    exit 0
+    ;;
   -c | --context)
     context="$2"
     shift