How to write redirects in docker nginx?

Question

Nginx

Good afternoon.
Tell me how to change the redirect correctly: I need it from without www to www

found this

if ($host ~* www\.(.*)) {
        set $host_without_www $1;
        rewrite ^(.*)$ http://$host_without_www$1 permanent;
    }

reverse
redirects are needed are registered in a separate include file /etc/nginx/vhosts/_redirect;

Answer 1

Why do you need if? Make a separate server block for the non-www host and add an unconditional redirect to it.