diff --git a/README.md b/README.md
index cfb38ed8..4d81229f 100644
--- a/README.md
+++ b/README.md
@@ -64,6 +64,7 @@ ros2 launch ros_ws/src/robot/autonomy/controls/launch/launch_controls.yaml
 Launch simulator (Isaac Sim and Ascent SITL):
 
 ```bash
+xhost +  # allow Docker access to Linux X-Server
 # start another terminal in docker container
 docker compose exec airstack_dev bash
 
diff --git a/simulation/isaac_sim_interface/launch_sim.py b/simulation/launch_sim.py
similarity index 100%
rename from simulation/isaac_sim_interface/launch_sim.py
rename to simulation/launch_sim.py