Use ros2 launch with ros2 docker (#465)

README.md

@@ -129,7 +129,7 @@ docker run -it -v /dev/:/dev/ --privileged -e DISPLAY -v /tmp/.X11-unix:/tmp/.X1
 Will only start `stereo_inertial_node` launch file (you can try different commands).
 ### Running docker image on ROS2
 ``` bash
-docker run -it -v /dev/:/dev/ --privileged -e DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix depthai_ros roslaunch depthai_examples stereo_inertial_node.launch.py
+docker run -it -v /dev/:/dev/ --privileged -e DISPLAY -v /tmp/.X11-unix:/tmp/.X11-unix depthai_ros ros2 launch depthai_examples stereo_inertial_node.launch.py
 ```
 
 
@@ -613,4 +613,4 @@ For easier development inside isolated workspace, one can use Visual Studio Code
       i_update_ros_base_time_on_ros_msg: false
       i_width: 1280
     use_sim_time: false
-```
+```