server {
    listen 10000;
    server_name localhost;

    root /app/frontend/dist;
    index index.html;

    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

    # API Proxy zum Backend
    location /api/ {
        proxy_pass http://127.0.0.1:4000/api/;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection 'upgrade';
        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_cache_bypass $http_upgrade;
        proxy_read_timeout 86400;
    }

    # Health Check Endpoint
    location /health {
        proxy_pass http://127.0.0.1:4000/health;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
    }

    # Frontend Static Files
    location / {
        try_files $uri $uri/ /index.html;
        
        # Cache static assets
        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
            expires 1y;
            add_header Cache-Control "public, immutable";
        }
    }

    # Security Headers
    add_header X-Frame-Options "SAMEORIGIN" 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;

    # Disable access to hidden files
    location ~ /\. {
        deny all;
    }
}