nginx config file

gistfile1.txt

upstream domain {
        server 127.0.0.1:3001;
}
server {
    listen       80;
    server_name  domain.io another.domain.io;
    return       301 http://main.domain.com$request_uri;
}
server {
        listen 80;
        server_name main.domain.com;
        access_log /var/log/nginx/domain-com.log;
        location ~ ^/(images|javascript|javascripts|stylesheets|fonts|robot.txt)/  {
                root    /var/www/domain/public;
                expires 1d;
        }
        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_set_header X-NginX-Proxy true;
          proxy_pass http://domain;
          proxy_redirect off;
        }
}

Forces redirect to main.domain.com, for example entering non-www URL or an alternative ending.

Static files are served directly from the directory the node app lives in. Other requests are sent to port 3001 running on the same box.