How to install Bluerobits/Companion.git

Hi , I have a problem about the lastest " Ardusub-Raspbian Image". It’s can not boots like this post.
[ Booting problem with Raspberry Pi 3 ] my SD card is32GB
At the last post, Blue Robotics Engineer - Patrick advice to install companion via “bluerobotics/companion” from github website.
And now I’m already download file to my RaspberryPi by use command " git clone GitHub - bluerobotics/companion: Companion computer startup scripts and examples "
So, How can i install that companion file ?
Thank you.