chore: pass VERSION as env var to docker build

Author: rocwind

Makefile

@@ -17,7 +17,7 @@ coverage:
 release-docker:
 	@echo "\nBuilding docker image..."
 	docker pull node:lts-alpine
-	docker build -t shmopen/code-push-server:latest --no-cache .
+	VERSION=${VERSION} docker build -t shmopen/code-push-server:latest --no-cache .
 	docker tag shmopen/code-push-server:latest shmopen/code-push-server:${VERSION}
 	docker push shmopen/code-push-server:${VERSION}
 	docker push shmopen/code-push-server:latest