nginx.conf

server {
    listen 80;
    server_name _;

    root /usr/share/nginx/html;
    index index.html;

    # 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;

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

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

    # Serve kintsugi.json with no-cache for the CMS sidecar
    location = /kintsugi.json {
        add_header Cache-Control "no-cache, no-store, must-revalidate";
        add_header Content-Type "application/json";
        add_header Access-Control-Allow-Origin "*";
    }

    # SPA fallback — always serve index.html for unknown routes
    location / {
        try_files $uri $uri/ $uri.html /index.html;
    }

    # Block access to dot files
    location ~ /\. {
        deny all;
    }
}