Anopensourcecontainersystem,Dockermakesdeployingapplicationspainlessandflexible.Dockerispowerfulandsimpletouse,anditmakeslifeeasierfordevelopersandadministratorsalikeprovidingshorterbuildtimes,fewerproductionbugs,andeffortlessapplicationroll-out.书中其他资源在https://github.com/docker-in-practice