We will continue to use an API client, such as Postman, for this chapter to test and develop our API endpoints. If you haven't installed Postman, or another client, I recommend that you do so to help make the cycle of retesting your requests much easier. Postman specifically supports the ability to set a form-data field to a file value, which is what we will need to test our multipart/form-data upload:
To parse our file uploads, we will also need a file upload parsing library called Multer. You must install Multer to your Express application's package.json file:
npm install multer --save
