You need to edit /etc/docker/daemon.json and add the folowing line:

{ "registry-mirrors": ["http://docker.bardia.tech:8080/"] }

Save the file and restart docker service (sytemctl restart docker)

To use with kubernetes:

To install kubernetes: kubeadm init --image-repository docker.bardia.tech:8080

To update kubernetes: kubeadm config images pull --image-repository docker.bardia.tech:8080