Start docker service on boot

My blog is host on vultr centos vm. The vm is not stable sometimes it auto reboots.

After that my blog is down. So it should be ensured that my blog is auto restarted after each reboot.

This involves two points:

1. Configure docker to start on boot

   sudo systemctl enable docker.service
   sudo systemctl enable containerd.service
   

2. Setup container restart policy

   This can be easily configured by the restart attribute in the compose file of each service.

   restart: unless-stopped