script: fix volumes in gx-teaching

scripts/gx-teaching

@@ -23,10 +23,10 @@ fi
 docker run -it \
 	-v "$BASEDIR/docs:/app/docs" \
 	-v "$BASEDIR/slides:/app/slides" \
+	-v "$BASEDIR/images:/app/images" \
 	-v "$BASEDIR/_build:/app/_build" \
 	-v "$BASEDIR/mkdocs.yml:/app/mkdocs.yml" \
 	$DOCKER_OPT_MARP_THEME \
-	-v "$BASEDIR/.marp:/app/.marp" \
 	-p 5200:5200 \
 	-p 5100:5100 \
 	"$DOCKER_IMAGE" "$ACTION"