Update Documentation for NGINX Configuration

I think that this task is not a duplicate.
if i use S3 nginx module configuration

location ~ ^/s3/files/styles/ {
            try_files $uri @rewrite;
    }

I get this error
could not find named location "@rewrite",

If i use above configuration

    location ~* ^/s3/files/styles/(.*)\.(png|svg|jpg|jpeg|gif|ico)$ {
    rewrite ^(.*)$ /index.php?q=$1;
}

no image is generated.

if i use previous configuration with WEBP image style conversion i get the right image.

So. can you provide a better documentation for Nginx?
Thank you