# Servidor del sitio estático. Se copia a /etc/nginx/conf.d/default.conf.
# TLS lo termina Traefik (Coolify); aquí solo HTTP en el 80.
server {
    listen 80;
    server_name _;

    root /usr/share/nginx/html;
    index index.html;
    charset utf-8;
    server_tokens off;

    # Compresión
    gzip on;
    gzip_vary on;
    gzip_comp_level 5;
    gzip_min_length 256;
    gzip_proxied any;
    gzip_types text/plain text/css text/xml application/javascript
               application/json application/xml image/svg+xml;

    # Cabeceras básicas de seguridad
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header X-Frame-Options "SAMEORIGIN" always;

    # Healthcheck (Docker HEALTHCHECK / Coolify)
    location = /healthz {
        access_log off;
        default_type text/plain;
        return 200 "ok\n";
    }

    # HTML: siempre revalidar.
    location = /index.html {
        add_header Cache-Control "no-cache" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
        add_header X-Frame-Options "SAMEORIGIN" always;
    }

    # CSS/JS con nombre fijo (sin hash): revalidar con ETag en cada carga.
    # No usar "immutable": Cloudflare serviría la versión vieja tras un deploy.
    location ~* \.(?:css|js)$ {
        add_header Cache-Control "no-cache" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
        add_header X-Frame-Options "SAMEORIGIN" always;
        try_files $uri =404;
    }

    # Imágenes (docs/capturas): caché de 1 día, sin immutable.
    location ~* \.(?:png|jpe?g|gif|webp|avif|svg|ico)$ {
        add_header Cache-Control "public, max-age=86400" always;
        add_header X-Content-Type-Options "nosniff" always;
        access_log off;
        try_files $uri =404;
    }

    location / {
        try_files $uri $uri/ =404;
    }
}