EXPORT EVERYTHING BEFORE STARTING!
https://wiki.ros.org/full_coverage_path_planner
ros2 launch turtlebot3_gazebo turtlebot3_world.launch.py
ros2 launch turtlebot3_cartographer cartographer.launch.py use_sim_time:=True
ros2 launch turtlebot3_navigation2 navigation2.launch.py use_sim_time:=true map:=assets/my_map.yaml
ros2 run nav2_map_server map_saver_cli -f my_map
export GAZEBO_MODEL_PATH=ros2 pkg \ prefix turtlebot3_gazebo
/share/turtlebot3_gazebo/models/
export TURTLEBOT3_MODEL=burger
https://ros2-industrial-workshop.readthedocs.io/en/latest/_source/navigation/ROS2-Cartographer.html