Update docs/src/pages/developers/installation.mdx

Co-authored-by: Till Prochaska <mail@tillprochaska.de>

docs/src/pages/developers/installation.mdx

@@ -154,7 +154,9 @@ To build the image you can run `make build`, which will build the `alephdata/ale
 
 ### Inspecting ElasticSearch
 
-At times it can be useful to inspect the contents of the ElasticSearch indices. The developer setup includes [dejavu](https://github.com/appbaseio/dejavu/stargazers), a web-based UI for ElasticSearch. In a local environment brought up as described above you should see dejavu under [http://localhost:1358](http://localhost:1358). You will need to pass it the local ES cluster URL (`http://localhost:19200`) and you can either inspect an individual index or use `*` to see the whole content.
+At times it can be useful to inspect the contents of the ElasticSearch indices. The developer setup includes [dejavu](https://github.com/appbaseio/dejavu), a web-based UI for ElasticSearch. In a local environment brought up as described above you should see dejavu under [http://localhost:1358](http://localhost:1358).
+
+You will need to pass it the local ES cluster URL (`http://localhost:19200`). You can either inspect an individual index or use `*` to see the whole content. Index names for entity indices follow the pattern `aleph-entity-{{SCHEMA_NAME}}-{{VERSION}}`. For example, the index name for `LegalEntity` entities is `aleph-entity-legalentity-v1`.
 
 ## Production deployment