server: ensure /var/lib/ocid/images exists

Signed-off-by: Antonio Murdaca <runcom@redhat.com>

server/server.go

@@ -2,6 +2,7 @@ package server
 
 import (
 	"fmt"
+	"os"
 
 	"github.com/mrunalp/ocid/oci"
 	"github.com/mrunalp/ocid/utils"
@@ -9,6 +10,7 @@ import (
 
 const (
 	runtimeAPIVersion = "v1alpha1"
+	imageStore        = "/var/lib/ocid/images"
 )
 
 // Server implements the RuntimeService and ImageService
@@ -26,6 +28,10 @@ func New(runtimePath, sandboxDir, containerDir string) (*Server, error) {
 		return nil, fmt.Errorf("failed to set server as subreaper: %v", err)
 	}
 
+	if err := os.MkdirAll(imageStore, 0755); err != nil {
+		return nil, err
+	}
+
 	r, err := oci.New(runtimePath, containerDir)
 	if err != nil {
 		return nil, err