Nginx
под ключ.

limit_req_zone $binary_remote_addr
    zone=api_limit:10m
    rate=10r/s;

upstream app_backend {
    least_conn;
    server 127.0.0.1:8000;
    keepalive 32;
}

server {
    listen 80;
    server_name example.ru www.example.ru;

    return 301 https://example.ru$request_uri;
}

server {
    listen 443 ssl;
    listen 443 quic reuseport;

    http2 on;

    server_name example.ru;

    ssl_certificate
        /etc/letsencrypt/live/example.ru/fullchain.pem;

    ssl_certificate_key
        /etc/letsencrypt/live/example.ru/privkey.pem;

    ssl_protocols TLSv1.2 TLSv1.3;

    server_tokens off;

    client_max_body_size 10m;

    add_header Strict-Transport-Security
        "max-age=31536000; includeSubDomains"
        always;

    add_header X-Content-Type-Options
        "nosniff"
        always;

    add_header Referrer-Policy
        "strict-origin-when-cross-origin"
        always;

    location / {
        limit_req zone=api_limit burst=20 nodelay;

        proxy_pass http://app_backend;

        proxy_http_version 1.1;

        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For
            $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
    }
}