Nginx www and not www 301 redirect

redirect not www to www

#blocco di redirect
server {
	listen 80;
        listen [::]:80;
	server_name evemilano.com;
	rewrite ^(.*) http://www.evemilano.com$1 permanent;
}

#blocco default
server {
        listen       80;
        listen [::]:80;
        server_name  www.evemilano.com;
        ...
}

Guida completa: https://www.evemilano.com/redirect-www-not-www/