Add retag target, update xrd image push

Makefile

@@ -7,8 +7,21 @@ base-image:
 xrootd-image:
 	docker build -t xrootd-se -f xrootd/Dockerfile xrootd
 
-push-base: base-image
+push-base: base-image xrootd-image
 	docker tag jalien-base ${gitlab_base_image}
 	docker push ${gitlab_base_image}
 
+push-xrootd: xrootd-image
+	docker tag xrootd-se ${gitlab_xrootd_image}
+	docker push ${gitlab_xrootd_image}
+
+pull-all:
+	docker pull ${gitlab_base_image}
+	docker pull ${gitlab_xrootd_image}
+
+retag:
+	docker tag ${gitlab_base_image} jalien-base
+	docker tag ${gitlab_xrootd_image} xrootd-se
+
+push-all: push-base push-xrootd
 all: base-image xrootd-image