Nginx Server Block & Reverse Proxy Config Generator

# ==========================================================================
# NGINX Configuration: example.com
# Generated via TwisterTools NGINX Config Studio
# Environment: Production Ready | Security & Performance Hardened
# ==========================================================================

server {
    listen 80;
    listen [::]:80;
    server_name example.com www.example.com;

    # ACME Challenge for Let's Encrypt automated renewals
    location ^~ /.well-known/acme-challenge/ {
        default_type "text/plain";
        root /var/www/letsencrypt;
    }

    # 301 Permanent Redirect all HTTP traffic to HTTPS
    location / {
        return 301 https://$host$request_uri;
    }
}

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name example.com www.example.com;
    root /var/www/example.com/html;
    index index.html index.htm index.php;

    # Disable NGINX signature in headers and error pages
    server_tokens off;

    # SSL / TLS Modern Cryptographic Configuration
    ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
    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:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
    ssl_prefer_server_ciphers off;
    ssl_session_timeout 1d;
    ssl_session_cache shared:SSL:10m;
    ssl_session_tickets off;
    ssl_stapling on;
    ssl_stapling_verify on;
    resolver 1.1.1.1 8.8.8.8 8.8.4.4 valid=300s;
    resolver_timeout 5s;

    # Enterprise Security Headers
    add_header X-Frame-Options "DENY" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
    add_header Content-Security-Policy "default-src 'self' http: https: data: blob: 'unsafe-inline'" always;
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;

    # Request Sizing & Buffering Limits
    client_max_body_size 16M;
    client_body_buffer_size 128k;
    keepalive_timeout 65;

    # Gzip Dynamic Content Compression
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_buffers 16 8k;
    gzip_http_version 1.1;
    gzip_min_length 256;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript image/svg+xml;

    # Access and Error Logs
    access_log /var/log/nginx/example.com.access.log combined buffer=512k flush=1m;
    error_log /var/log/nginx/example.com.error.log warn;

    # Block dotfiles (.git, .env, .htaccess, etc.)
    location ~ /\.(?!well-known) {
        deny all;
        access_log off;
        log_not_found off;
    }

    # High-Performance Static Asset Caching
    location ~* \.(?:ico|css|js|gif|jpe?g|png|webp|avif|woff2?|eot|ttf|svg)$ {
        expires 30d;
        add_header Cache-Control "public, max-age=2592000, immutable";
        access_log off;
        try_files $uri =404;
    }

    # Reverse Proxy Gateway
    location / {
        proxy_pass http://127.0.0.1:3000;
        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;
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Port $server_port;
        # WebSocket Support
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
    }
}