put nginx behind aws ELB?

Question

Currently my server littlehome.kr points to an ec2 nginx and I'm changing DNS entry so that www.littlehome.kr points to the ELB.

I want multiple nginx (target) behind ELB. (That's the point of having load balancer anyway.)

1. Should all of my nginx conf would use littlehome.kr as server_name?

2. I want www.littlehome.kr to be redirected to littlehome.kr How can I do that?

I had the following in my nginx.conf

server {
# http://stackoverflow.com/a/19238614/433570
  listen 80;
  server_name www.littlehome.kr;
  return 301 $scheme://littlehome.kr$request_uri;
}