$ npm ci

For development purpose, you can copy the template file :

$ cp public/env.dist.json public/env.json

and edit it to point to the API.

Otherwise you can set some env variables like API_HOST which will tell to the app where the backend is located.

The app will also try to find a from querystring parameters with the host of the referrer. It will try to fetch a ${host}/env.json file. If no from param si passed, it will look on its own host.

$ npm start