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Install this script in the cloned directory using the following command:

npm install

Copy the .env file into place with

cp .env.example .env

And set your email and password.

After that run the script with the following command:

watch -n 5000 --differences node server.js

Or add it to your crontable:

crontab -e

For the crontab all paths in MUST be absolute. Within the open cron editor window

0 14 * * * /usr/local/bin/node /Users/<USER_NAME>/<PATH_TO>/grab_packt/server.js >> /tmp/cron_output

Make sure you have a output file to write to