How to Deploy on Different Services With fly.io

I just started on fly.io for a client and it was pretty straightforward. But when we wanted another environment, it took some time to figure it all out. You have to go to the machine and then do ENV and then you can see all of your environment variables. That's the only way you can do it. It is nice to be able to open the share easily on that. Yeah, I mean to each turn on.