Update Dockerfile

Author: peterdavidfagan

.docker/object_detection/Dockerfile

@@ -50,7 +50,8 @@ RUN eval "$(/pyenv/bin/pyenv init -)" && /pyenv/bin/pyenv local 3.10.6 && poetry
 RUN . .venv/bin/activate && \
     . /opt/ros/${ROS_DISTRO}/setup.sh && \
     apt-get update && \
-    apt-get install -y ros-${ROS_DISTRO}-rmw-cyclonedds-cpp && \
+    apt-get install -y ros-${ROS_DISTRO}-rmw-cyclonedds-cpp python-empy && \
+    pip uninstall em && \
     rosdep update && \
     DEBIAN_FRONTEND=noninteractive \
     rosdep install --from-paths src --ignore-src -r -y --rosdistro ${ROS_DISTRO} && \