one-command script to load new datasource

so users can quickly move beyond the NBA example. do this for both docker-compose and kubernetes follow-on: create instructions on how to format the data (if not already present) follow-on: create instructions on how to scale up for very large datasets that must be loaded in parallel

this would be very helpful!

First step for single node docker: https://github.com/tracyhenry/Kyrix/wiki/Tutorial#loading-data-into-docker-container

For large distributed applications, where should we assume data originally is? I'm thinking CSV, Postgres, HDFS, etc. Scripts needed for migrating data from these sources to Citus.