Hi!
It looks like the elasticsearch-oss Docker images aren't available from Docker Hub (https://hub.docker.com/_/elasticsearch). Is there any specific reason for this? The problem we're having at the moment is that we are unable to cache the elasticsearch-oss image locally, because we need to use docker.elastic.co/elasticsearch/elasticsearch-oss:7.7.1 as the reference to get it, and such references can't be fetched transparently from a local Docker registry pull-through cache.
It's of course possible to work around this by building our own versions of the elasticsearch-oss image, but it'd be one less moving part if the OSS variant would be available from Docker Hub as well.