Any idea how to send commits from Github repo to SuiteScript folder... or opposed to that, if script file is changed push new file to Github?

CLI or IDE? With WebStorm, you can install the Github plug-in and commit and push in one action. With the CLI tools, it should be possible to create a hook in git that calls a script to pushes the changed files to the SuiteScript folder. I think other people should chime in: there may be some ready-made tools/instructions out there!