nginx.conf

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

    # Cache static assets
    location ~* \.(css|js|svg|png|jpg|jpeg|gif|ico|woff2?)$ {
        expires 1d;
        add_header Cache-Control "public, must-revalidate";
    }

    # Security headers
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;

    # Health check endpoint
    location /health {
        access_log off;
        return 200 '{"status":"ok"}';
        add_header Content-Type application/json;
    }

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

    # Gzip
    gzip on;
    gzip_types text/plain text/css application/json text/html application/javascript image/svg+xml;
    gzip_min_length 256;
}