A simple nginx config for sinatra app [with passenger app server]

example.com.conf

server {
    listen  80;
    server_name  www.example.com;
    rewrite ^(.*) http://example.com$1 permanent;
}

server {
  listen 80;
  server_name example.com;

  root /home/username/example.com/public;
  passenger_enabled on;
  
  # Cache static content
  location ~* \.(?:ico|css|js|gif|jpe?g|png)$ {
    expires 30d;
    add_header Vary Accept-Encoding;
    access_log off;
  }
}