Update status.py

improve instance status (python manage.py status)

backend/core/management/commands/status.py

@@ -21,8 +21,11 @@ def handle(self, *args, **kwargs):
         nb_risk_assessments = RiskAssessment.objects.all().count()
         nb_risk_scenarios = RiskScenario.objects.all().count()
         nb_risk_acceptances = RiskAcceptance.objects.all().count()
+        created_at = Folder.get_root_folder().created_at
+        last_login = max(x['last_login'] for x in User.objects.all().values('last_login'))
         self.stdout.write(
-            f"users={nb_users} first_logins={nb_first_login} libraries={nb_libraries} "
+            f"created_at={created_at.strftime('%Y-%m-%dT%H:%M')} last_login={last_login.strftime('%Y-%m-%dT%H:%M')} "
+            + f"users={nb_users} first_logins={nb_first_login} libraries={nb_libraries} "
             + f"domains={nb_domains} projects={nb_projects} assets={nb_assets} "
             + f"threats={nb_threats} functions={nb_functions} measures={nb_measures} "
             + f"evidences={nb_evidences} compliance={nb_compliance_assessments} risk={nb_risk_assessments} "