Feature: A way to construct a `Network` object for an existing docker network

What are you trying to do?

Attach a DockerContainer to an existing network. In my specific case, the network was created as part of a composable setup, and I'd like to attach a new container to that network.

Why should it be done this way?

I suppose my suggestion would be a way to construct a Network object by simply passing the name in as an argument. Best I can tell that name property is all that is really needed when the DockerContainer is started.

A perhaps easier way might be to create a new class

class ExistingNetwork:
    def __init__(self, network_name: str):
        self.name = network_name

While this I think could be passed into DockerContainer.with_network & it seems to work, it might be better to have this inherit Network and explicitly override the other methods in the Network class to ensure they are not called.

core/testcontainers/core/network.py の Network の name プロパティ周辺から始め、DockerContainer.with_network を調査します。既存のネットワーク名を、そのネットワークを作成または管理せずに表現する方法を確認し、DockerContainer の起動時にそのネットワークへ接続できることを検証します。