This is a simple web teleop app for ROS 2 (Foxy).
$ cd ~/ros2_ws/src
$ git clone --recurse-submodules git@github.com:mgonzs13/ros2_web_teleop.git
$ cd ros2_web_teleop
$ pip3 install -r requirements.txt
$ cd ~/ros2_ws
$ rosdep install --from-paths src -r -y
$ colcon build
$ ros2 launch web_teleop teleop.launch.py