upstream rollout {
        ip_hash;
        server localhost:5500;
        server localhost:5501;
}
limit_req_zone $binary_remote_addr zone=perip:10m rate=1r/s;
limit_req_zone $server_name zone=perserver:10m rate=10r/s;

server {
    ...
    limit_req zone=perip burst=5 nodelay;
    limit_req zone=perserver burst=10;
}
server {
        listen       80;
        listen       [::]:80;
        server_name  serversfault.com;
        return 301 https://$host$request_uri;
    }
server {
        listen 443 ssl http2;
        listen [::]:443 ssl http2;
        server_name  serversfault.com;
        root         /home/rollout/rollout;

        # certs sent to the client in SERVER HELLO are concatenated in ssl_certificate
        ssl_certificate /etc/letsencrypt/live/serversfault.com/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/serversfault.com/privkey.pem;
        ssl_session_timeout 1d;
        ssl_session_cache shared:SSL:50m;
        ssl_session_tickets off;

        # Diffie-Hellman parameter for DHE ciphersuites, recommended 2048 bits
        # ssl_dhparam /path/to/dhparam.pem;

        # intermediate configuration. tweak to your needs.
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:E$
        ssl_prefer_server_ciphers on;

        # HSTS (ngx_http_headers_module is required) (15768000 seconds = 6 months)
        add_header Strict-Transport-Security max-age=15768000;

        resolver 8.8.8.8;

        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

        location / {
            proxy_http_version 1.1;

            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";

            proxy_pass "http://rollout/";
            }

        error_page 404 /404.html;
            location = /40x.html {
        }

        error_page 500 502 503 504 /50x.html;
            location = /50x.html {
        }
    }