Ask HN: How to create portable AMP installer for Mac

I am referring to this package by moodle https://docs.moodle.org/31/en/Installation_Package_for_OS_X

They have packaged their PHP + mysql application as portable installer.

I can manually install a php app on MAMP but not sure if there are any tutorials to create DMG installer with everything in it.

If you can point me to the steps or list them here I will be really grateful.

Thank you in advance.