fix: add react_app prefix into the available env variables

[danielbarion]

close #1060

[danielbarion]

@gabrieljablonski please go ahead to merge it and do a new release when you have time, thanks!

[gabrieljablonski]

@danielbarion I was actually still unable to make this work on a fresh CRA project. Looking into it.

[gabrieljablonski]

@danielbarion Apparently using anything other than process.env.NODE_ENV from inside node_modules does not seem that trivial. Tried a few things and still couldn't get it to work.

Please also try looking into this whenever you have the time.

[danielbarion]

@gabrieljablonski

The issue is that process is undefined on the browser, even with CRA being able to get the envs

I'll try to solve it

[danielbarion]

When I remove the validation:

[gabrieljablonski]

Dropped env variables in favor of #1052