Fix local Docker Elasticsearch setup

Fix local Docker Elasticsearch setup

• Remove redundant scripts/docker/es which seems unused
• Match file structure in https://gitlab.com/gl-infra/gitter-infrastructure/tree/6ecdeb818563f44140dfb705c06f4ef3cd01fff1/ansible/roles/elasticsearch/instances/prod/files/elastic-config
  • We aren't including all of the ansible/roles/elasticsearch/instances/prod/files/elastic-config/languages because they require a tokenizer plugins to be manually installed (this is normally handled here https://gitlab.com/gl-infra/gitter-infrastructure/blob/6ecdeb818563f44140dfb705c06f4ef3cd01fff1/ansible/roles/elasticsearch/versions/v1/tasks/main.yml#L55)

Todo

• Figure out why nothing actually gets replicated (although nothing was replicated before anyway),
  • http://localhost:9200/_plugin/river-mongodb/ shows "Last Replicated - never" "Documents Indexed - 0", https://i.imgur.com/sLZxSZY.png
  • docker exec -it webapp_elasticsearch_1 /bin/bash -> /data/es/logs/es-command-output.log shows nothing out of the ordinary, https://gitlab.com/snippets/1709251
  • http://localhost:9200/_river/gitterChatRiver01/_meta?pretty=true looks normal
  • Just going to merge regardless because it didn't work previously and this is a better state anyway (green cluster, etc).