I have a standard React app that is using ViteJS.
I want to deploy my app to different environments:

1. Dev
2. Test
3. Staging
4. Production

I already have .env files for each of those environments:

1. .env.localhost
2. .env.dev
3. .env.test
4. .env.staging
5. .env.prod

Do you know what I need to do in order to make sure that the appropriate file is being loaded when I deploy the app on each environment ?

I was experimenting on localhost (windows) by setting those two Environment Variables, but I cannot make it work so far:

1. NODE_ENV: staging
2. ENV: staging

How are you doing this ? How do you load different configurations for different environments ?