server {
  listen 80;
  server_name app.example.com;
  rewrite ^ https://$server_name$request_uri? permanent;
}
 
server {
  listen 443;
  server_name app.example.com;
 
  ssl on;
  ssl_certificate /etc/nginx/ssl/ssl.crt;
  ssl_certificate_key /etc/nginx/ssl/ssl.key;
 
  location = /favicon.ico {
    root /home/ubuntu/app/bundle/static;
    access_log off;
    expires 1w;
  }
 
  location ~* "^/[a-z0-9]{40}\.(css|js)$" {
    root /home/ubuntu/app/bundle/static_cacheable;
    access_log off;
    expires max;
  }
 
  location / {
    proxy_pass http://localhost:3000;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_set_header Host $host;
  }
}