chore: copy elk setup from docker-elk git repo

https://github.com/deviantony/docker-elk

elasticsearch/config/elasticsearch.yml

@@ -0,0 +1,12 @@
+---
+## Default Elasticsearch configuration from Elasticsearch base image.
+## https://github.com/elastic/elasticsearch/blob/main/distribution/docker/src/docker/config/elasticsearch.yml
+#
+cluster.name: docker-cluster
+network.host: 0.0.0.0
+
+## X-Pack settings
+## see https://www.elastic.co/guide/en/elasticsearch/reference/current/security-settings.html
+#
+xpack.license.self_generated.type: trial
+xpack.security.enabled: true