Native setup and Downsample data (#4)

* PrinterDataAPIView downsample

* filament usage chart now works without day constraint

* One command native setup

* add setup timezone verification and link

* added wipe off instructions

* setup default to port 80

* user selectable port number with default to 80

* skip superuser creation if exists

* auto install iptables if not available

* wipe out instructions updated

standalone/manage.py

@@ -5,7 +5,15 @@ import sys
 
 # Ensure the project root (/app) is on sys.path so that both 'standalone'
 # and 'bambu_run' are importable regardless of where this script is invoked from.
-sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+PROJECT_ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+sys.path.insert(0, PROJECT_ROOT)
+
+# Load .env so manage.py commands pick up env vars outside of systemd/Docker
+try:
+    from dotenv import load_dotenv
+    load_dotenv(os.path.join(PROJECT_ROOT, ".env"))
+except ImportError:
+    pass
 
 
 def main():