relaypi.py is the main python file. README.md is this file you reading on. launcher.sh is the shell script to run this command. logs folder is folder to store error logs.
I use this tutorial to run this script in startup: https://www.tomshardware.com/how-to/run-script-at-boot-raspberry-pi (Using the terminal GUI, not the crontab)
nano /home/pi/.config/autostart/relaypi.desktop for the startup execution