Elasticsearch indexes for heatmaps

Hey guys,

I was just trying to customize stuff a little bit when it comes to heatmaps in Optimize, but to get a better understanding of what is going on under the hood I would like to have a quick look at the elasticsearch indexes and how are they organized. So far I tried to retrieve them running C8 on my local env using this docker compose, but apparently the most important indexes are not there. I see in the logs Could not evaluate report because required instance index [process-instance] does not exist. Returning empty result instead and upon fetching all indexes curl GET http://localhost:9200/_aliases?pretty=true I see a lot of irrelevant data.

Q: Is there any kind of graceful way to browse those indexes? Especially the ones that are being used for heatmaps drawing.