Why is docker image of Data Prepper run as root

Hello all,

we want to add open search to our stack for displaying traces, metrics and logs collected through Open Telemetry Collector. One prerequisite is to not have any docker containers run as root (which is also a best practice). While opensearchproject/opensearch and opensearchproject/opensearch-dashboards run without root, opensearchproject/data-prepper runs as root.

Is there a special reason for this or can this be changed?