Networking with docker-compose
By default, docker-compose sets up a single network for your application(s) where each container can reach and discover other containers.
The network is given a name based on the name of the directory it lives in. Thus, if your directory is called py_docker, when your run docker-compose up, the network created is called py_docker_default.
We mentioned ports in the previous topic, when creating the WordPress container. To explain networking better, we'll use the docker-compose.yml used to spin up a WordPress application:
In this file, we have two services: db and wordpress.
In the WordPress service, we have the ports
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