How to automatically update nginx upstream server list(privateip:80) when i create AWS instance

Question

This is my nginx upstream backend config, upstream backend {

    #ip_hash;
    server unix:/run/gunicorn.sock;
    server private_ip:80;
    server private_ip:80;
    server private_ip:80;
    server private_ip:80;
    server private_ip:80;

}

After creating the new instance in AWS I need to add that instance private IP address in this upstream backend automatically. it is possible or not.