you will need to glue together (and maintain) a bunch of different open-source projects to achieve the same capabilities - here are some: https://github.com/danger/danger-js, https://github.com/probot/probot, https://github.com/Yelp/detect-secrets, https://github.com/github/licensed, and many more...

Here's one for credential scanning:

https://github.com/dxa4481/truffleHog

I developed this a while ago and it was used as gate check in a Linux Foundation project. Its essentially the same as the OP project (regex based), but without the GUI.

https://anteater.github.io/