nginx.conf

upstream unicorn_server {
 server unix:/var/rails/shared/pids/unicorn.sock fail_timeout=0;
}

server {
  listen 80;
  server_name foo.edu bar.edu;
  return 301 https://bar.edu$request_uri;
}

server {
  listen 443;
  server_name foo.edu;
  return 301 https://bar.edu$request_uri;
}

server {
  listen 443;
  server_name	bar.edu;

  ssl on;
  ssl_certificate /etc/ssh/certs/bar.edu.crt;
  ssl_certificate_key /etc/ssh/certs/bar.edu.key;

  root /var/rails/current/public;

  location / {
    try_files $uri $uri/ $uri.html =404;

    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $http_host;
    proxy_redirect off;

    if (!-f $request_filename) {
      proxy_pass http://unicorn_server;
      break;
    }
  }

  error_page 500 502 503 504 /500.html;

  location = /500.html {
    root /var/rails/current/public;
  }
}