What is Elasticsearch?
Elasticsearch is a powerful open source search and analytics engine, and it’s easy to add to your stack as an add-in.
To add Elasticsearch to your stack, access the add-ins menu, click Elasticsearch and choose the size of your new server. This adds three environment variables to your stack:
ELASTICSEARCH_ADDRESS, which you can use to connect to your Elasticsearch instance.
For docker stacks this will be added to the host not as a container.