What options exist to run Docker-in-Docker (DinD) on OpenShift Container Platform 4?

Issue

• We are using legacy CI/CD systems that require the /var/run/docker.sock UNIX socket to be present into pods running jobs or workers.
• We previously had an environment such as OpenShift 3 or another Kubernetes vendor that used Docker as a container engine which we passed the host's Docker socket into these jobs.
• As Red Hat OpenShift Container Platform 4 does not use the Docker container engine, what options are available for migrating our existing CI/CD platforms that require access to a Docker socket to function?