blog.conf

upstream thin_cluster {
    server unix:/tmp/thin.blog.0.sock;
    server unix:/tmp/thin.blog.1.sock;
}

server {
    listen 80;
    server_name blog.example.com;

    root /var/www/sites/blog/current/public;

    location / {
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        proxy_redirect off;

        if (-f $request_filename/index.html) {
            rewrite (.*) $1/index.html break;
        }
        if (-f $request_filename.html) {
            rewrite (.*) $1.html break;
        }
        if (!-f $request_filename) {
            proxy_pass http://thin_cluster;
            break;
        }
    }

    error_page 500 502 503 504 /50x.html;
    location = /50x.html {
        root html;
    }
} 

files.conf

server {
    listen       80;
    server_name  files.example.com;

    # auto file listing
    autoindex    on;

    location / {
        root    /var/www/sites/files/;
        index   index.html index.htm;
    }
}

nginx.conf

user  www-data;
worker_processes  1;

error_log  /var/log/nginx/error.log;
pid        /var/run/nginx.pid;


events {
    worker_connections  1024;
}

http {
    include       mime.types;
    default_type  application/octet-stream;

    access_log /var/log/nginx/access.log;

    sendfile        on;

    keepalive_timeout  65;

    #gzip  on;

    # default server
    server {
        listen       80;
        server_name  example.com www.example.com;

        location / {
            root   /var/www/domain/;
            index  index.html index.htm;
        }

        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }

    include /usr/local/nginx/conf/vhosts/*;
}