Merge pull request moby#47780 from AkihiroSuda/cherrypick-createmount…

…point-23

[23.0] mounts/validate: Don't check source exists with CreateMountpoint

volume/mounts/linux_parser.go

@@ -94,7 +94,9 @@ func (p *linuxParser) validateMountConfigImpl(mnt *mount.Mount, validateBindSour
 			if err != nil {
 				return &errMountConfig{mnt, err}
 			}
-			if !exists {
+
+			createMountpoint := mnt.BindOptions != nil && mnt.BindOptions.CreateMountpoint
+			if !exists && !createMountpoint {
 				return &errMountConfig{mnt, errBindSourceDoesNotExist(mnt.Source)}
 			}
 		}