/opt/mytempwork/sidecar/kube-mutating-webhook-tutorial-master is not within a known GOPATH/src
# _/opt/mytempwork/sidecar/kube-mutating-webhook-tutorial-master
./webhook.go:70:20: cannot use runtimeScheme (type *"k8s.io/apimachinery/pkg/runtime".Scheme) as type *"k8s.io/kubernetes/vendor/k8s.io/apimachinery/pkg/runtime".Scheme in argument to "k8s.io/kubernetes/pkg/apis/core/v1".AddToScheme
Sending build context to Docker daemon 285.7kB
Step 1/3 : FROM alpine:latest
latest: Pulling from library/alpine
9d48c3bd43c5: Pull complete
Digest: sha256:72c42ed48c3a2db31b7dafe17d275b634664a708d901ec9fd57b1529280f01fb
Status: Downloaded newer image for alpine:latest
---> 961769676411
Step 2/3 : ADD kube-mutating-webhook-tutorial /kube-mutating-webhook-tutorial
ADD failed: stat /var/lib/docker/tmp/docker-builder643695243/kube-mutating-webhook-tutorial: no such file or directory