Change format to fetch env variables [django.mdx]

[lennyAiko]

Fetching an env variable following the format on the documentation returns None

Issue:

A method to get this to work is using environ package

Expected:

Do let me know your thoughts on this.

[lennyAiko]

While I await any contributions on this, I will start working on a PR

[lennyAiko]

To also improve the user experience. What if it is possible to add installations for the requirements?

That way the user get what they need on the spot to move to the next step.