Is dotenv necessary with Bun?

In the AI course, I was wondering… Since we are using Bun for our project, do we really need to install dotenv? Doesn’t Bun handle environment variables automatically by understanding .env files and system variables already?
I read that there could be some issue with it down the line, but for the course project, and maybe even simpler projects, is it necessary? And if it is necessary, wouldn’t there be some configuration in Bun to stop auto-finding environment variables and start using dotenv explicitly?