This is a simple monitoring tool that I developed in a day. It's very modular since you have to write part of the code yourself. Credit for @wagoodman for his diff2HtmlCompare repo.
Make sure to follow the install steps for diff2HtmlCompare by going into that dir and running
pip3 install -r requirements.txt
Then just write up a python class that inherits from RequestObj. See selftest.py for an example.
Then in checker.py, add it to the list REQUEST_OBJS.
Next fill in your pushover details in pushover.py. Finally, you can edit and use run.sh to automate the execution of the monitoring in a cronjob.
Page versions are maintained in the pages directory. Diffs are found in the Results directory.