Update on_startup.sh

on_startup.sh

@@ -14,13 +14,15 @@ virtualenv my_project_env
 source my_project_env/bin/activate
 pip install jupyter
 
+JUPYTER_TOKEN="${JUPYTER_TOKEN:=a}"  
 
+echo "Starting Jupyter Lab with token $JUPYTER_TOKEN"
 jupyter notebook \
     --ip 0.0.0.0 \
     --port 7183 \
     --no-browser \
     --allow-root \ 
-    --NotebookApp.token='a' \
+    --NotebookApp.token="$JUPYTER_TOKEN" \
     --NotebookApp.password='' \
     --NotebookApp.allow_origin='*' \
     --NotebookApp.disable_check_xsrf=True \