How to config Single node for Single Cluster (Standalone Cluster) ElasticSearch

Question

I installed elastic search in my local machine, I want to configure it as the only one single node in the cluster(Standalone Server). it means whenever I create a new index, it

Answer 1

I wanted to do this without having to write/overwrite an elasticsearch.yml in my container. Here it is without a config file

Set an environment variable prior to starting elasticsearch:

discovery.type=single-node

https://www.elastic.co/guide/en/elasticsearch/reference/current/docker.html