With Container Run

When we run the container using docker container run --publish 80:80 --name <container-name> nginx, it actually interpret by docker container run --publish 80:80 --name <container-name> -d nginx:latest nginx -T.

This command do the following steps:

• Look for Nginx image in local cache, if not found get it from Docker registry.
• If we specify the image version, it will be downloaded
• If we do not specify the image, it will download the latest version
• Create a container out of the image
• Give a virtual IP on a private network inside the Docker Engine
• Open port 80 in host machine and forward all traffic of 80 to docker container port 80
• Start executing container start up command

So while run the container using the specified command, we can change the port mapping and also the image version.