cmd/containerd: split package for cli.App

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

cmd/containerd/command/config_linux.go

@@ -0,0 +1,16 @@
+package command
+
+import (
+	"github.com/containerd/containerd/defaults"
+	"github.com/containerd/containerd/server"
+)
+
+func defaultConfig() *server.Config {
+	return &server.Config{
+		Root:  defaults.DefaultRootDir,
+		State: defaults.DefaultStateDir,
+		GRPC: server.GRPCConfig{
+			Address: defaults.DefaultAddress,
+		},
+	}
+}