For questions related to `python-dotenv` library which reads the key-value pair from `.env` file and adds them to the environment variable.
Library Pypi page: https://pypi.org/project/python-dotenv/
There are plenty of alternative implementations: https://pypi.org/search/?q=dotenv
Other runtimes:
- dotenv for nodejs
- phpdotenv for PHP
- ruby-dotenv for Ruby