Generates a EPUB for the Google SRE Book.
Original sources are downloaded from https://landing.google.com/sre/
Review and run the
bootstrap.sh script to generate the EPUB.
Note: Currently relies on python2 and pip to install dependencies
and does not setup a virtualenv. Please review the script and edit
as per your needs. If you have direnv
installed, it will set up the virtualenv for you after you run