Do not prebuild wockerspace for docker, only source base ros

Dockerfile

@@ -13,13 +13,14 @@ RUN apt-get update && apt-get install -y ros-melodic-desktop-full wget nano pyth
 RUN apt-get install -y \
       ros-melodic-libfranka python-catkin-tools libeigen3-dev 
 RUN apt-get install -y python-rosinstall python-rosinstall-generator python-wstool build-essential
+RUN apt-get install vim -y
 RUN rosdep init && rosdep update
 
 RUN mkdir -p /root/ws_tmp /root/Desktop && ln -s /usr/share/applications/lxterminal.desktop /root/Desktop/lxterminal.desktop
 ENV ROS_DISTRO=melodic
 
-RUN /bin/bash -c "echo -e 'source /root/Desktop/ros_ws/devel/setup.bash\n \
-      umask 000\n \
+RUN /bin/bash -c "echo -e 'umask 000\n \
+      source /opt/ros/melodic/setup.bash\n \
       cd /root/Desktop/ros_ws/\n' >> /root/.bashrc "
 
 WORKDIR /root/ws_tmp
@@ -30,7 +31,6 @@ COPY ./src /root/ws_tmp/src
 RUN apt-get update && rosdep install --from-paths . -r -y
 
 RUN catkin config \
-      --extend /opt/ros/melodic && \
-    catkin build
+      --extend /opt/ros/melodic
 ENV OPENBOX_ARGS --startup "/root/copyws.sh"
 VOLUME /root/Desktop/ros_ws