nginxで静的コンテンツとphpとnodejsのリクエストをうまいことさばく

nginx.conf

upstream proxy {
  server  localhost:3000;
}

server {
  listen       80  default_server;
  server_name  _;
  return       404;
}

server {
  listen       80;
  charset      UTF-8;
  server_name  geta6.com
               favorymous.com
               permsproject.com;
  rewrite      ^  http://www.$host;
}

server {
  listen       80;
  charset      UTF-8;
  server_name  ~^(.+)\.(geta6\.com)$
               ~^(.+)\.(favorymous\.com)$
               ~^(.+)\.(permsproject\.com)$;
  set          $subdomain $1;
  set          $hostbase  $2;
  root         /var/www/$hostbase/$subdomain/public;
  location  / {
    index  index.php index.html;
    if (-f $request_filename) {
      expires  7d;
      break;
    }
    if (-f $request_filename/index.php) {
      rewrite  ^(.*) $uri/index.php last;
      break;
    }
    if (-f $document_root/index.php) {
      rewrite  ^(.*) /index.php last;
      break;
    }
    if (!-f $request_filename) {
      proxy_pass  http://proxy;
    }
    location ~* \.php$ {
      fastcgi_pass  localhost:9000;
      include       /etc/nginx/conf.d/fastcgi.conf
    }
  }
}

proxy.coffee

#!/usr/bin/env coffee

proxy = require 'http-proxy'

proxy.createServer( (req, res, proxy) ->

  switch req.headers.host
    when 'www.favorymous.com' then port = 30001
    else port = 404

  proxy.proxyRequest req, res,
    host: req.headers.host
    port: port

).listen 3000