Imports of package registry

PathSynopsis
contextPackage context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes.
encoding/jsonPackage json implements encoding and decoding of JSON as defined in RFC 7159.
github.com/moby/buildkit/cache/remotecache
github.com/moby/buildkit/cache/remotecache/v1
github.com/moby/buildkit/session
github.com/moby/buildkit/solver
github.com/opencontainers/go-digestPackage digest provides a generalized type to opaquely represent message digests and their operations within the registry.
github.com/sirupsen/logrusPackage logrus is a structured logger for Go, completely API compatible with the standard library logger.