Zone Apex / Naked Domain / Root Domain redirect to the www subdomain by nginx

nginx.conf

# Zone Apex / Naked Domain / Root Domain redirect to the www subdomain by nginx
# Here is a part of nginx config file
#
# For example on Debian 6 (Squeeze)
# /etc/nginx/site-available/default 
#
server {
	listen   80; ## listen for ipv4
	listen   [::]:80 default ipv6only=on; ## listen for ipv6

	server_name  your.domain;
	rewrite ^/(.*) http://www.your.domain/$1 permanent;
}