**What happened**:  https://testgrid.k8s.io/sig-network-gateway-api#post-gateway-api-push-images ``` hack/build-and-push.sh unknown flag: --build-arg See 'docker --help'. Usage: docker [OPTIONS] COMMAND ``` There were several changes in this area https://github.com/kubernetes-sigs/gateway-api/commit/7a1324159a500c08596f5458e936f3bb65ef8592