Work on json api example

README.md

@@ -33,6 +33,7 @@ For more information on how to integrate your code we have split the information
 - [Development Environment: Control](https://gitlab.liu.se/lrs/lrs_devenv_control/-/blob/master/README.md)
 - [Development Environment: Motion Planning](https://gitlab.liu.se/lrs/lrs_devenv_motion_planning/-/blob/master/README.md)
 - [Development Environment: Task Planning](https://gitlab.liu.se/lrs/lrs_devenv_task_planning/-/blob/master/README.md)
+- [Development Environment: JSON/MQTT API Robot Integration](https://gitlab.liu.se/lrs/lrs_devenv_json/-/blob/main/README.md) Shows examples of how to implement the JSON API for a robot on different levels.
 - [Development Environment: ROS2 Robot Integration](https://gitlab.liu.se/lrs/lrs_devenv_ros2/-/blob/main/README.md) Email lrs-devenv@groups.liu.se to ask for access to this developmen environment. It is work in progress...