Massive speedup in executing startup_scripts

docker/docker-entrypoint.sh

@@ -45,10 +45,7 @@ fi
 if [ "$SKIP_STARTUP_SCRIPTS" == "true" ]; then
   echo "↩️ Skipping startup scripts"
 else
-  for script in /opt/netbox/startup_scripts/*.py; do
-    echo "⚙️ Executing '$script'"
-    ./manage.py shell --interface python < "${script}"
-  done
+  echo "import runpy; runpy.run_path('../startup_scripts')" | ./manage.py shell --interface python
 fi
 
 # copy static files