Add Makefile to push mrva agent container image

cmd/agent/Makefile

@@ -0,0 +1,21 @@
+all: mrva-agent
+
+MAI_TARGET := mrva-agent:0.1.24
+mai: mrva-agent
+mrva-agent:
+	cd ../../ && docker build -t mrva-agent:0.1.24 -f cmd/agent/Dockerfile .
+	touch $@
+
+mai-serve: mai
+	docker run --rm -it ${MAI_TARGET} /bin/bash
+
+clean:
+	-docker rmi -f ${MAI_TARGET}
+	-rm mrva-agent
+
+mai-push: mai
+	docker tag ${MAI_TARGET} ghcr.io/hohn/${MAI_TARGET}
+	docker push ghcr.io/hohn/${MAI_TARGET}
+	touch $@
+
+