Fix docker buildx build to save images to filesystem

See merge request !364

Makefile

@@ -66,16 +66,16 @@ build-orchestrator: pre
 containerize-all: containerize-gosdn containerize-gosdnc containerize-orchestrator containerize-target
 
 containerize-gosdn:
-	docker buildx build --rm -t gosdn -f controller/controller.Dockerfile .
+	docker buildx build --rm -t gosdn --load -f controller/controller.Dockerfile .
 
 containerize-gosdnc:
-	docker buildx build --rm -t gosdnc -f cli/cli.Dockerfile .
+	docker buildx build --rm -t gosdnc --load -f cli/cli.Dockerfile .
 
 containerize-orchestrator:
-	docker buildx build --rm -t orchestrator -f csbi/csbi.Dockerfile .
+	docker buildx build --rm -t orchestrator --load -f csbi/csbi.Dockerfile .
 
 containerize-target:
-	docker buildx build --rm -t gnmi-target -f csbi/gnmi-target/gnmitarget.Dockerfile .
+	docker buildx build --rm -t gnmi-target --load -f csbi/gnmi-target/gnmitarget.Dockerfile .
 
 containerlab-start: containerize-all
 	sudo containerlab deploy --topo gosdn.clab.yaml