The basic Dockerfile examples do not use an init system to manage processes within the container. If you are deploying containers into a production environment, there are reasons why you may wish to add an init system to your containers. Here are some links you may find useful:
- The CentOS page on DockerHub discusses systemd integration.
- If you're using Ubuntu, you might consider the Phusion baseimage for Ubuntu.
- And there are other alternatives, such as dumb-init.
