.env.template is missing

Hi, I see you are missing `.env.template` file
which is useful for other users to test this app locally and add required environment variables
i already created PR which has it with small code refactoring
if i am missing any `.env` variables do let me know i will update it, thanks.

Link to PR

https://github.com/2M4U/2m4u/pull/8

The issue is about adding a .env.template file for environment variables. Check the existing .env file or any configuration documentation to list required variables. The PR #8 mentioned may already contain the solution, so review it to see if it's merged or needs updates.

Scritto dal modello di indicizzazione a partire dal testo della issue.