Elastic search status is running but still getting no reply on curl localhost:9200

I am using elastic search in my laravel project using package elasticquent, I followed this specific tutorial Laravel Elastic Search

and before that I installed elastic search on my OS(Ubuntu) by following the documentation. After setting all things I get no reply error after spending some time on error I ran to some solution which says I have to make changes in my elasticsearch.yml file

Changes I made

cluster.name = <my-cluster-name>

node.name = <my-node-name> //basically my System name 

I got credentials for above field by the following command

curl --cacert /etc/elasticsearch/certs/http_ca.crt -u elastic http://localhost:9200

which gives response as follows

{
  "name" : "Cp8oag6",
  "cluster_name" : "elasticsearch",
  "cluster_uuid" : "AT69_T_DTp-1qgIJlatQqA",
  "version" : {
    "number" : "8.4.1",
    "build_type" : "tar",
    "build_hash" : "f27399d",
    "build_flavor" : "default",
    "build_date" : "2016-03-30T09:51:41.449Z",
    "build_snapshot" : false,
    "lucene_version" : "9.3.0",
    "minimum_wire_compatibility_version" : "1.2.3",
    "minimum_index_compatibility_version" : "1.2.3"
  },
  "tagline" : "You Know, for Search"
}

so after doing all setup and following the tutorial when I visit my search url I get No nodes alive and If I try curl -X GET localhost:9200 It gives no reply error.