Imports of package cache

PathSynopsis
contextPackage context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes.
github.com/containerd/logPackage log provides types and functions related to logging, passing loggers through a context, and attaching context to the logger.
github.com/docker/docker/api/types/container
github.com/docker/docker/daemon/loggerPackage logger defines interfaces that logger drivers implement to log messages.
github.com/docker/docker/daemon/logger/localPackage local provides a logger implementation that stores logs on disk.
github.com/docker/go-unitsPackage units provides helper function to parse and print size and time units in human-readable format.
github.com/pkg/errorsPackage errors provides simple error handling primitives.
strconvPackage strconv implements conversions to and from string representations of basic data types.