Build image
docker build -t perconalab/percona-xtradb-cluster Dockerfile
or
docker build --build-arg PXC_VERSION=5.6.29 -t perconalab/percona-xtradb-cluster Dockerfile
Tag image
docker tag <NNNNN> perconalab/percona-xtradb-cluster:5.6
Push to hub
docker push perconalab/percona-xtradb-cluster:5.6