Opensearch Security - Read only Role

@guhan
The files need to be modified and mapped via volumes in docker-compose.yml, see example below:

ulimits:
      memlock:
        soft: -1
        hard: -1
      nofile:
        soft: 65536
        hard: 65536
    volumes:
      - opensearch-data2:/usr/share/opensearch/data
      - ./node1-key.pem:/usr/share/opensearch/config/node-key.pem
      - ./node1.pem:/usr/share/opensearch/config/node.pem
      - ./admin-key.pem:/usr/share/opensearch/config/admin-key.pem
      - ./admin.pem:/usr/share/opensearch/config/admin.pem
      - ./root-ca.pem:/usr/share/opensearch/config/root-ca.pem
      - ./internal_users.yml:/usr/share/opensearch/plugins/opensearch-security/securityconfig/internal_users.yml
      - ./roles_mapping.yml:/usr/share/opensearch/plugins/opensearch-security/securityconfig/roles_mapping.yml
      - ./tenants.yml:/usr/share/opensearch/plugins/opensearch-security/securityconfig/tenants.yml
      - ./roles.yml:/usr/share/opensearch/plugins/opensearch-security/securityconfig/roles.yml
      - ./config.yml:/usr/share/opensearch/plugins/opensearch-security/securityconfig/config.yml
      - ./opensearch.yml:/usr/share/opensearch/config/opensearch.yml

PM me for further details and examples of complete files.