Now that we've got ourselves a running application, you'll have played around a bit and created, read, updated, and deleted many notes.
Suppose for a moment this isn't a toy application, but one that is interesting enough to draw a million users a day. Serving a high load typically means adding servers, load balancers, and many other things. A core part is to have multiple instances of the application running at the same time to spread the load.
Let's see what happens when you run multiple instances of the Notes application at the same time.
The first thing is to make sure the instances are on different ports. In bin/www, you'll see that setting the PORT environment variable controls the port being used. If thePORTvariable is not set, it defaults tohttp://localhost:3000, or what we've been using all along.
Let's open up package.json and add these lines to the scripts section:
"scripts": {
"start": "DEBUG=notes:* node ./bin/www",
"server1...