好的，正如您在问题中所说，您的进程正在侦听 localhost:4200 上的连接.

Ok, as you say in your question, your process is listening to connection on localhost:4200.

在一个docker容器内，localhost是容器本身的loopback设备的地址，与你的宿主网络是分开的，无法访问的.

Inside a docker container, localhost is the address of the loopback device of the container itself, which is separated and not reachable from your host network.

您需要编辑您的节点进程，以便通过编辑 Dockerfile 中的入口点使其监听所有地址，如下所示:

You need to edit your node process in order to make it listen to all addresses by editing the entrypoint in your Dockerfile as follows:

ENTRYPOINT ["ng", "serve", "-H", "0.0.0.0"]