Add Elasticsearch to the base docker image.
Will be needed to run swh-search tests.
Test Plan
"docker build" works on my machine
Migrated from D2071 (view on Phabricator)
Staging instance, all changes can be removed at any time
Will be needed to run swh-search tests.
"docker build" works on my machine
Migrated from D2071 (view on Phabricator)