ReactJS where do I store the API URI?

Where would I store the API URI centrally in a ReactJS Application? The URI only changes between environments and should be easily configurable (i.e. through environment variables).

I have looked into this package and into the new Context API, but am unsure it's the best way to achieve this. I have also looked into dotenv, but I don't like that I would have to use process.env.REACT_APP_SERVICE_URI in every component that wants to access the API. What is the usual approach?

I am not using Redux.