启动docker后台容器，测试运行helloWorld

//使用下面的命令运行helloWorld
docker run hello-world
//成功会出现下方信息
Unable to find image \'hello-world:latest\' locally
latest: Pulling from library/hello-world
1b930d010525: Pull complete 
Digest: sha256:4df8ca8a7e309c256d60d7971ea14c27672fc0d10c5f303856d7bc48f8cc17ff
Status: Downloaded newer image for hello-world:latest

Hello from Docker!
This message shows that your installation appears to be working correctly.

Docker和虚拟机的区别

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