Composition over Inheritance
With Docker, it is pretty easy to have all the tooling a project needs inside one image. However, if the project requires a new dependency, the image would need to be modified, tested, and rebuilt. In order to avoid this, use dedicated images that do specific things.
Multiple Docker Network
By default, Compose creates a Docker network based on the project's name. All services can talk to each other within the same network. The network's name can be configured by setting the environment variable COMPOSE_PROJECT_NAME. This variable can be set in a
.env file. This is useful when wanting to have different environments locally. For instance, the network's name could be based on an environment such as