Adding this code in your server block
if ($host ~* ^www\.(.*)){
set $host_without_www $1;
rewrite ^/(.*)$ $scheme://$host_without_www/$1 permanent;
}
# unless the request is for a valid file, send to bootstrap
if (!-e $request_filename) {
rewrite ^(.+)$ /index.php?q=$1 last;
}
# enable this
location ~ /\.ht
{
deny all;
}