Services are where most of the action happens. Our application defines two, and we’ll look at each in turn.

The web-fe service

As you can see, the web-fe service defines an image, an app, the desired number of replicas, rules for updating the app, a restart policy, which network to connect to, which ports to publish, and how to mount a volume. That’s a lot to take in, so I’ve annotated it in the book. Take a minute to read through the file and annotations.

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