current search_api_solr module has no solr-conf directory
The current setup procedure relies on the solr-conf/7.x directory to be initially mapped into the solr container. This does not work with the current search_api_solr module.
We should either
- use the official
drush search-api-solr:get-server-config
to load the current config and deploy it in solr (more complicated). - check in an initial solr config like we did with older search_api_solr.