chore: copy elk setup from docker-elk git repo

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

elasticsearch/Dockerfile

@@ -0,0 +1,7 @@
+ARG ELASTIC_VERSION
+
+# https://www.docker.elastic.co/
+FROM docker.elastic.co/elasticsearch/elasticsearch:${ELASTIC_VERSION}
+
+# Add your elasticsearch plugins setup here
+# Example: RUN elasticsearch-plugin install analysis-icu