How do I run realsense_camera package built with catkin without running a script before?

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The realsense_camera package is not available for ROS Lunar, therefore I have built it from source as described in this tutorial. At the end of the tutorial an example on how to use the package is given:

source ~/catkin_ws/devel/setup.bash
roslaunch realsense_camera r200_nodelet_default.launch

So I want to avoid running this script every time and just run the package as if I installed it from repository:

roslaunch realsense_camera r200_nodelet_default.launch

I haven't ever used catkin before so I don't understand what the commands in tutorial actually do. Here is the contents of ~/catkin_ws/devel/setup.bash

#!/usr/bin/env bash
# generated from catkin/cmake/templates/setup.bash.in

CATKIN_SHELL=bash

# source setup.sh from same directory as this file
_CATKIN_SETUP_DIR=$(builtin cd "`dirname "${BASH_SOURCE[0]}"`" > /dev/null && pwd)
. "$_CATKIN_SETUP_DIR/setup.sh"

How do I do this? If I understand it correctly, the package is not installed in the system. Does catkin has something like make install?