nginx

I have generated a hardened Nginx configuration for your Node.js application, including TLS settings, WebSocket proxying, and optimized static asset handling.

Hardened Nginx Configuration

# /etc/nginx/sites-available/node-app.conf

upstream node_backend {
    server 127.0.0.1:3000;
    keepalive 64;
}

server {
    listen 80;
    listen [::]:80;
    server_name example.com;
    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl;
    listen [::]:443 ssl;
    http2 on;
    server_name example.com;

    ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;

    # Security Headers
    add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;

    # Static Assets
    location /static/ {
        alias /var/www/dist/;
        expires 1y;
        add_header Cache-Control "public, immutable";
        access_log off;
    }

    # WebSocket Support
    location /ws/ {
        proxy_pass http://node_backend;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_read_timeout 3600s;
    }

    # Default Proxy
    location / {
        proxy_pass http://node_backend;
        include /etc/nginx/proxy_params;
    }
}

Next steps

1. Run nginx -t to verify the configuration syntax.
2. Link the file: ln -s /etc/nginx/sites-available/node-app.conf /etc/nginx/sites-enabled/.
3. Reload the service with systemctl reload nginx.