Create a folder named config in the main project folder root and in that create a file named index.js and add the following content:
module.exports = {
googleApiKey: "<your_google_api_key_goes_here>", // used for reversegeolocation
facebookAppKey: "<your_facebook_app_id_goes_here>" // used for facebook authentication
}
Now open a terminal and change into the project directory and run the following commands to start the app in expo
npm install
npm start