nginx.conf

events {
    worker_connections 1024;
}

http {
    # Rate Limit Rule: 10 requests per minute
    limit_req_zone $binary_remote_addr zone=api_limit:10m rate=10r/m;

    upstream backend {
        server backend:3000;
    }

    server {
        listen 80;

        location / {
            # Apply Limit
            limit_req zone=api_limit burst=5 nodelay;

            proxy_pass http://backend;

            # Forward headers
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

            # WebSocket Support
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }
    }
}