Imports of package metrics

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/pkg/plugingetter
github.com/docker/docker/pkg/pluginsPackage plugins provides structures and helper functions to manage Docker plugins.
github.com/docker/docker/plugin
github.com/docker/go-metrics
github.com/opencontainers/runtime-spec/specs-go
github.com/pkg/errorsPackage errors provides simple error handling primitives.
github.com/prometheus/client_golang/prometheusPackage prometheus is the core instrumentation package.
netPackage net provides a portable interface for network I/O, including TCP/IP, UDP, domain name resolution, and Unix domain sockets.
net/httpPackage http provides HTTP client and server implementations.
osPackage os provides a platform-independent interface to operating system functionality.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.
syncPackage sync provides basic synchronization primitives such as mutual exclusion locks.
timePackage time provides functionality for measuring and displaying time.