Add .env.example file

[dhairyaostwal]

.env is simply used to store all sensitive files like password API key, database,and so on as environment variables to be used in your code later this sensitive files are not included in the code base and will not be there when been pushed to git. .env.example This is a file that tells other programmer what is meant to be in there code when your code is cloned or been used by another user.

Example .env API_KEY="hwhhwhshs6585gahwhgwuwjwusuhs"

.env.example API_KEY="YOUR API KEY GOES HERE"