Reorganize files for easier build

ros_entrypoint.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+set -e
+
+# setup ros environment
+source "/opt/ros/$ROS_DISTRO/setup.bash" --
+
+if [ -e "$CATKIN_SETUP_FILE" ]; then
+	# Source the setup.bash file
+	source "$CATKIN_SETUP_FILE" --
+	echo "Sourced $CATKIN_SETUP_FILE"
+else
+	echo "Warning: $CATKIN_SETUP_FILE does not exist. Not running using a catkin workspace"
+fi
+exec stdbuf -o L "$@"