Added launch_site management command

backend/app/management/commands/launch_site.py

@@ -0,0 +1,24 @@
+"""
+Django management command launch_site
+"""
+
+import platform
+import subprocess
+
+from django.core.management.base import BaseCommand
+from django.core.management import call_command
+
+
+class Command(BaseCommand):
+    """
+    Custom django-admin command to launch the local website
+    """
+
+    help = "Custom django-admin command to launch the local website"
+
+    def handle(self, *args, **options):
+        on_windows = platform.system() == "Windows"
+        frontend_cmd = [f"npm{".cmd" if on_windows else ""}", "run", "start"]
+        frontend = subprocess.Popen(frontend_cmd)
+        call_command("runserver")
+        frontend.kill()