In this recipe, you will build an ExpressJS application with a very small API to test your application when making HTTP requests and dealing with asynchronous data flow and errors. First, create a new package.json file with the following content:

{ 
    "dependencies": { 
        "express": "4.16.3", 
        "node-fetch": "2.1.2", 
        "redux": "4.0.0" 
    } 
} 

Then install the dependencies by opening a Terminal and running:

npm install