nginx.conf

server {
    listen 80;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_min_length 256;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/json
        application/javascript
        application/xml
        application/rss+xml
        image/svg+xml;

    # 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;
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
    add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; img-src 'self' data: blob:; connect-src 'self'; worker-src 'self' blob:; manifest-src 'self';" always;

    # Health check endpoint
    location /health {
        access_log off;
        return 200 "healthy\n";
        add_header Content-Type text/plain;
    }

    # Service worker - never cache
    location /sw.js {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        add_header Pragma "no-cache";
        add_header Expires "0";
    }

    # PWA manifest - short cache
    location /manifest.webmanifest {
        add_header Cache-Control "no-cache, must-revalidate";
        types { application/manifest+json webmanifest; }
    }

    # Workbox files - never cache
    location ~* ^/workbox- {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
    }

    # Hashed assets - immutable long cache
    location /assets/ {
        add_header Cache-Control "public, max-age=31536000, immutable";
    }

    # Translation files - moderate cache
    location /locales/ {
        add_header Cache-Control "public, max-age=3600, must-revalidate";
    }

    # Images - long cache
    location ~* \.(png|jpg|jpeg|gif|svg|webp|ico)$ {
        add_header Cache-Control "public, max-age=604800";
    }

    # Fonts - immutable long cache
    location ~* \.(woff|woff2|ttf|eot)$ {
        add_header Cache-Control "public, max-age=31536000, immutable";
    }

    # SPA fallback
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Error handling
    error_page 404 /index.html;
    error_page 500 502 503 504 /index.html;
}