🌐 Add Nginx configuration and setup scripts

- Added nginx-smartsoltech.conf: Ready-to-use Nginx config with SSL, proxy, security headers
- Added setup-nginx.sh: Automated Nginx setup script with symlink creation
- Added NGINX_SETUP.md: Comprehensive Nginx setup guide with troubleshooting
- Added NGINX_QUICK_SETUP.md: Quick reference cheatsheet

Features:
- HTTP to HTTPS redirect
- www to non-www redirect
- Proxy to Django (localhost:8000)
- SSL configuration (ready for Let's Encrypt)
- Security headers (HSTS, XSS, etc)
- Logging configuration
- Automated default removal and symlink creation

nginx-smartsoltech.conf

@@ -0,0 +1,89 @@
+# SmartSolTech Nginx Configuration
+# Скопировать в: /etc/nginx/sites-available/smartsoltech
+
+# Редирект с www на non-www
+server {
+    listen 80;
+    listen [::]:80;
+    server_name www.smartsoltech.kr;
+    return 301 https://smartsoltech.kr$request_uri;
+}
+
+# HTTP → HTTPS редирект
+server {
+    listen 80;
+    listen [::]:80;
+    server_name smartsoltech.kr;
+
+    # Let's Encrypt challenge
+    location /.well-known/acme-challenge/ {
+        root /var/www/certbot;
+    }
+
+    location / {
+        return 301 https://$server_name$request_uri;
+    }
+}
+
+# HTTPS конфигурация
+server {
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+    server_name smartsoltech.kr;
+
+    # SSL сертификаты (раскомментировать после получения от Let's Encrypt)
+    # ssl_certificate /etc/letsencrypt/live/smartsoltech.kr/fullchain.pem;
+    # ssl_certificate_key /etc/letsencrypt/live/smartsoltech.kr/privkey.pem;
+    # ssl_trusted_certificate /etc/letsencrypt/live/smartsoltech.kr/chain.pem;
+
+    # SSL настройки
+    ssl_protocols TLSv1.2 TLSv1.3;
+    ssl_ciphers HIGH:!aNULL:!MD5;
+    ssl_prefer_server_ciphers on;
+    ssl_session_cache shared:SSL:10m;
+    ssl_session_timeout 10m;
+
+    # Security headers
+    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header X-XSS-Protection "1; mode=block" always;
+
+    # Максимальный размер загружаемых файлов
+    client_max_body_size 100M;
+
+    # Логи
+    access_log /var/log/nginx/smartsoltech_access.log;
+    error_log /var/log/nginx/smartsoltech_error.log;
+
+    # Прокси к Django приложению
+    location / {
+        proxy_pass http://localhost:8000;
+        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_redirect off;
+        proxy_buffering off;
+        
+        # Таймауты
+        proxy_connect_timeout 60s;
+        proxy_send_timeout 60s;
+        proxy_read_timeout 60s;
+    }
+
+    # Статические файлы (опционально, если выносить из Docker)
+    # Раскомментировать если хотите отдавать статику напрямую из Nginx
+    # location /static/ {
+    #     alias /opt/smartsoltech_site/smartsoltech/staticfiles/;
+    #     expires 30d;
+    #     add_header Cache-Control "public, immutable";
+    # }
+
+    # Медиа файлы (опционально, если выносить из Docker)
+    # location /media/ {
+    #     alias /opt/smartsoltech_site/smartsoltech/media/;
+    #     expires 7d;
+    #     add_header Cache-Control "public";
+    # }
+}