Add : Sample.env

[Nazi-pikachu]

Describe the bug Sample.env file got removed accidentally in this commit caec5c47d0d660ada077d13d8e41fadac8cd582b

To Reproduce Check the current yaus repo , there isn't any sample.env currently in it

Expected behavior There should be a sample.env file to keep track of all env variables

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context Add any other context about the problem here.