fix example 1

Author: DominikN

README.md

@@ -62,17 +62,17 @@ ros2 launch my_turtle_bringup turtlesim_demo.launch.py
 **Please stay in `ros2_docker_examples/` directory while executing those commands:**
 
 ```
-sudo chmod +x eg1/init-container.sh
 sudo chmod +x eg1/ros_entrypoint.sh
 
 docker build -t turtle_demo -f eg1/Dockerfile .
 
 xhost local:root
 
-docker run --rm -it \
+sudo docker run --rm -it \
 --env DISPLAY \
 --volume /tmp/.X11-unix:/tmp/.X11-unix:rw \
-turtle_demo
+turtle_demo \
+ros2 launch my_turtle_bringup turtlesim_demo.launch.py
 ```
 
 ## [Eg. 2] Running in two containers (using `docker-compose`)

eg1/Dockerfile

@@ -2,20 +2,12 @@ FROM osrf/ros:foxy-desktop
 
 SHELL ["/bin/bash", "-c"]
 
-# Create a new user "user1"
-RUN useradd -ms /bin/bash user1 && usermod -aG sudo user1 && echo 'user1     ALL=(ALL) NOPASSWD:ALL' >> /etc/sudoers
-
-WORKDIR /home/user1
-
 COPY ros2_ws ros2_ws/
 RUN cd ros2_ws && \
     source /opt/ros/foxy/setup.bash && \
     colcon build
 
 COPY eg1/ros_entrypoint.sh /
-COPY eg1/init-container.sh /opt
-
-USER user1
 
 ENTRYPOINT ["/ros_entrypoint.sh"]
-CMD /opt/init-container.sh
+CMD ["bash"]

eg1/init-container.sh

@@ -2,6 +2,6 @@
 set -e
 
 source /opt/ros/foxy/setup.bash
-source /home/user1/ros2_ws/install/setup.bash
+source /ros2_ws/install/setup.bash
 
 exec "$@"