容器中可以運行一些網絡應用，要讓外部也可以訪問這些應用，可以通過 -P 或 -p 參數來指定端口映射。
當使用 -P 標記時，Docker 會隨機映射一個端口到內部容器開放的網絡端口。

使用:Mac M1。

創建容器，注意port已將80轉出到8888

docker container run -d --rm --name web -p 8888:80 nginx

查看IP:

$ docker inspect --format '{{ .NetworkSettings.IPAddress }}' web
172.17.0.3

創建image busybox，名為client的容器:

docker run -d --rm --name client busybox /bin/sh -c "while true; do sleep 3600; done"

下載web的index.html:

$ docker exec -it client wget http://172.17.0.3
Connecting to 172.17.0.3 (172.17.0.3:80)
saving to 'index.html'
index.html           100% |********************************|   615  0:00:00 ETA
'index.html' saved

輸入:ifconfig，查找自己的IP，如下:192.168.1.108

en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
    options=6463<RXCSUM,TXCSUM,TSO4,TSO6,CHANNEL_IO,PARTIAL_CSUM,ZEROINVERT_CSUM>
    ether a0:78:17:a6:e9:f5
    inet6 fe80::c75:fc71:85f1:6b48%en0 prefixlen 64 secured scopeid 0xb
    inet 192.168.1.108 netmask 0xffffff00 broadcast 192.168.1.255
    inet6 2001:b011:7:1540:c2b:e11f:4b75:5eed prefixlen 64 autoconf secured
    inet6 2001:b011:7:1540:cc5b:e1c7:11df:d59e prefixlen 64 autoconf temporary
    nd6 options=201<PERFORMNUD,DAD>
    media: autoselect
    status: active

開啟瀏覽器輸入:

192.168.1.108:8888

會看到nging的頁面

Welcome to nginx!
If you see this page, the nginx web server is successfully installed and working. Further configuration is required.

For online documentation and support please refer to nginx.org.
Commercial support is available at nginx.com.

Thank you for using nginx.