Fix Docker collectstatic error

- Add STATIC_ROOT setting to Django configuration
- Update .dockerignore to allow staticfiles directory
- Ensure collectstatic works properly in Docker build
- Resolves ImproperlyConfigured error during image build

Author: manduinca

config/settings.py

@@ -140,6 +140,7 @@
 # https://docs.djangoproject.com/en/4.2/howto/static-files/
 
 STATIC_URL = "static/"
+STATIC_ROOT = BASE_DIR / "staticfiles"
 
 # Default primary key field type
 # https://docs.djangoproject.com/en/4.2/ref/settings/#default-auto-field