feat: Adds STATIC_ROOT for static files collection

Configures the STATIC_ROOT setting to specify the directory
where static files should be collected. Facilitates deployment
by allowing Django to gather static files in one location for
serving, aligning with Django's static files management
guidelines.

src/synapse_registration/synapse_registration/settings.py

@@ -174,6 +174,7 @@ USE_TZ = True
 # https://docs.djangoproject.com/en/5.1/howto/static-files/
 
 STATIC_URL = "static/"
+STATIC_ROOT = BASE_DIR / "static"
 
 # Default primary key field type
 # https://docs.djangoproject.com/en/5.1/ref/settings/#default-auto-field