Create a Simple API:
Handling Errors & Improving the Project Setup (Video 4)

This tutorial is based exclusively on Maximillian Schwarzmüller's Creating a REST API with Node.js starting with Part 3 Handling Errors & Improving the Project Setup. It shows just the coding occurring in video 4.

1. In the node directory, install nodemon: npm --install-dev nodemon.
2. Open package.json, and add this line just below "test": "start": "nodemon server.js". You may have to add a {} (left brackets) so that keywords looks like this
   

   "keywords": ["nodejs",
       "restful",
       "api"
     ],

3. At the commend line, enter npm start. (I get an error here which I have not figured out.)
4. To see logging messages, install morgan: npm --install-save morgan. (Errors here also.)
5. Open app.js and just below the const app line, add const morgan = require('morgan');
6. Still in app.js, just below the const orderRoutes line, add app.use(morgan('dev'));
7. Also to app.js, below the app.use('/orders line, enter these lines:

   app.use((req, res, next) => {
       const error = new Error('Not found');
       error.status(404);
       next(error);
   })
   
   app.use((error, req, res, next) => {
       res.status(error.status || 500);
       res.json({
           error: {
               message: error.message
           }
       });
   });
   

8. Create some errors.