How to add data volume to ElasticSearch docker-compose.yml - docker

Question

I have created a docker-compose.yml for Elasticsearch and Kibana as shown below. The docker-compose.yml is working fine but with no index and data. I remember in one of my database specific docker-compose.yml I adds data like as shown below and within the docker/db folder I places my dq sql scripts
services:
postgres:
image: postgres:9.6
volumes:
- ./docker/db:/docker-entrypoint-initdb.d
environment:
POSTGRES_DB: some_db
ports:
- 5432:5432
Now the question similarly to be above way how do I specify ES index and data volume, what should be the ES file extension
To be more specific I want the below ES index and data to be there when the elasticsearch is started
PUT test
POST _bulk
{ "index" : { "_index" : "test"} }
{ "name" : "A" }
{ "index" : { "_index" : "test"} }
{ "name" : "B" }
{ "index" : { "_index" : "test"} }
{ "name" : "C" }
{ "index" : { "_index" : "test"} }
{ "name" : "D" }
docker-compose.yml
version: '3.7'
services:
# Elasticsearch Docker Images: https://www.docker.elastic.co/
elasticsearch:
image: docker.elastic.co/elasticsearch/elasticsearch:7.4.0
container_name: elasticsearch
environment:
- xpack.security.enabled=false
- discovery.type=single-node
ulimits:
memlock:
soft: -1
hard: -1
nofile:
soft: 65536
hard: 65536
cap_add:
- IPC_LOCK
volumes:
- elasticsearch-data:/usr/share/elasticsearch/data
ports:
- 9200:9200
- 9300:9300
kibana:
container_name: kibana
image: docker.elastic.co/kibana/kibana:7.4.0
environment:
- ELASTICSEARCH_HOSTS=http://elasticsearch:9200
ports:
- 5601:5601
depends_on:
- elasticsearch
volumes:
elasticsearch-data:
driver: local