Make it easy to configure gateway configs with environment variables with a .env file to prevent the tedious exercise of doing export PASSWORD=jaiowjfe each time a user opens a new shell session or doesn't want to hard code in a bash config.

Can use this: https://github.com/theskumar/python-dotenv

Internal slack thread: https://tobikodata.slack.com/archives/C08PZF4PL21/p1747171622029019