GitHub Actions

https://github.com/features/actions

1. 01beginnergithub-actionsnode

   Fail the build when published content stops being valid

   A CI step parses every code snippet a site publishes using the real tool for its declared format, so a snippet that stops being valid breaks the build instead of sitting published and wrong.

2. 02intermediategithub-actionsnpm

   Build, test and deploy on every push to main

   A GitHub Actions workflow installs, tests and builds on every push to main and then runs one publish step, cancelling an older run when a newer push arrives.