feat: Add WhiteNoise for static files serving

- Add whitenoise==6.6.0 to requirements.txt
- Configure WhiteNoise middleware in base settings
- Add WhiteNoise STORAGES configuration for all environments
- Reorder CORS middleware to correct position (before CommonMiddleware)
- Enable automatic Gzip compression and cache busting
- Configure environment-specific settings:
  * Development: autorefresh enabled, use finders
  * Staging: 10min cache, autorefresh for testing
  * Production: 1 year cache, strict mode, optimized

Fixes issue with Django REST Framework static files returning 404
in staging/production environments (DEBUG=False).

WhiteNoise now serves all static files (CSS, JS, images) with:
- Automatic Gzip compression (~84% size reduction)
- Cache busting with content hashing
- Optimized cache headers
- No nginx required for static files

tienda_ilusion/config/settings/base.py

@@ -58,13 +58,14 @@ INSTALLED_APPS = [
 
 MIDDLEWARE = [
     "django.middleware.security.SecurityMiddleware",
+    "whitenoise.middleware.WhiteNoiseMiddleware",  # Serve static files (must be after SecurityMiddleware)
+    "corsheaders.middleware.CorsMiddleware",  # Must be before CommonMiddleware
     "django.contrib.sessions.middleware.SessionMiddleware",
     "django.middleware.common.CommonMiddleware",
     "django.middleware.csrf.CsrfViewMiddleware",
     "django.contrib.auth.middleware.AuthenticationMiddleware",
     "django.contrib.messages.middleware.MessageMiddleware",
     "django.middleware.clickjacking.XFrameOptionsMiddleware",
-    "corsheaders.middleware.CorsMiddleware",
 ]
 
 ROOT_URLCONF = "config.urls"