Post install node script for setting up .env for apps

[akhilmhdh]

Description

For better getting started experience, as a postintall command lets execute a node script that copies the content of .env.example of apps into .env.

Checklist

• Should check for .env.example if not exist pass
• Should not hardcode the packages. Do it for only available ones in apps folder.
• This should not happen inside a docker build