Broken dotenv? .env not picking up variables

[Geczy]

create-react-app tester
cd tester
nano .env
    SITE_NAME=Tester
nano . src/App.js
    {process.env.SITE_NAME}

See attached, both in public/index.html and src/App.js
untitled.zip

[jihchi]

Note: You must create custom environment variables beginning with REACT_APP_. Any other variables except NODE_ENV will be ignored to avoid accidentally exposing a private key on the machine that could have the same name. Changing any environment variables will require you to restart the development server if it is running.

ref: https://github.com/facebookincubator/create-react-app/tree/master/packages/react-scripts/template#adding-custom-environment-variables

[Geczy]

Oh wow. I didn't see that. I think it should be more explicit than just a "Note" as it's a pretty breaking requirement.

[gaearon]

Send a PR to change the user guide? It’s open source 😉