nginx.conf

upstream backend {
  server 127.0.0.1:3000 fail_timeout=0;
}
server {
  listen 80;

  server_name mydomain.com;

  root /path/to/project/public;

  access_log off;

  # GZIP compression

  gzip            on;
  gzip_min_length 1000;
  gzip_comp_level 3;
  gzip_types      text/plain text/css text/javascript application/x-javascript application/json;
  gzip_proxied    any;
  gzip_vary       on;

  # Performance & connectivity optimizations

  tcp_nodelay on;
  keepalive_timeout 600s;

  # Ignored URLs
  location ~ null { return 404; }
  location ~ google-analytics\.com/ga\.js { return 404; }
  location ~ avg_ls_dom\.js { return 404; }

  location / {
    error_page 405 = /system/maintenance.html;

    try_files $uri /system/maintenance.html @backend;
  }

  location ~* /(assets|system) {
    expires 1y;
    add_header Cache-Control public;

    gzip_static on;

    open_file_cache          max=1000 inactive=600s;
    open_file_cache_valid    600s;
    open_file_cache_errors   on;

    try_files $uri =404;
  }

  location @backend {
    proxy_set_header Host $host;
    proxy_set_header X-Real-IP $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;

    proxy_redirect off;

    proxy_pass http://backend;
  }
}