feat: added a makefile task to build and publish new image version

Makefile

@@ -6,14 +6,29 @@ up:	## Start all the services
 start: up install-deps 	## Start openpod application
 	docker-compose exec open-pod iex -S mix phx.server
 
+.PHONY: install-deps
 install-deps: container/open-pod	## Install worms dependencies
 	docker-compose exec open-pod mix deps.get
 
+.PHONY: stop
 stop:	## Shoutdown services
 	docker-compose down -v
 
+.PHONY: help
 help:
 	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
 
 container/%:
 	@docker ps -q --no-trunc --filter status=running | grep $$(docker-compose ps -q $*) >/dev/null 2>&1 || docker-compose up -d $*
+
+.PHONY: build_and_publish
+build_and_publish: check-version
+	@docker build -t openpod/open-pod:latest .
+	@docker push openpod/open-pod:latest
+	@docker build -t openpod/open-pod:${VERSION} .
+	@docker push openpod/open-pod:${VERSION}
+
+check-version:
+ifndef VERSION
+	$(error VERSION is undefined)
+endif