Nginx + Passenger Virtual Host Rails 6 app

  server {

    client_max_body_size 30M;
    server_name sistema.example.com.ar;

    # ~2 seconds is often enough for most folks to parse HTML/CSS and
    # retrieve needed images/icons/frames, connections are cheap in
    # nginx so increasing this is generally safe...
    keepalive_timeout 5;

    # path for static files
    root /var/www/sistema.example.com.ar/current/public;

    access_log      /var/log/nginx/example.access.log;
    error_log       /var/log/nginx/example.error.log warn;

    passenger_enabled on;
    passenger_min_instances 4;

    # Rails error pages
    error_page 500 502 503 504 /500.html;
    location = /500.html {
      root /var/www/sistema.example.com.ar/current/public;
    }

    location ~ ^/(assets|packs)/  {
      root /var/www/sistema.example.com.ar/current/public;
      gzip_static on; # to serve pre-gzipped version
      expires max;
      add_header Cache-Control public;
    }

    listen 443 ssl http2; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/sistema.example.com.ar/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/sistema.example.com.ar/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}

passenger_pre_start http://sistema.example.com.ar/;

server {
    if ($host = sistema.example.com.ar) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen 80;
    server_name sistema.example.com.ar;
    return 404; # managed by Certbot
}

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