Make prune

Makefile

@@ -35,7 +35,10 @@ logs: ## Follow container logs.
 	@echo "${green}Showing logs...${no_color}"
 	docker compose logs --follow
 
-.PHONY: help setup build up down status logs
+prune: ## Remove dangling images for this project.
+	docker image prune --filter "label=com.docker.compose.project=casanova_online" -f
+
+.PHONY: help setup build up down status logs prune
 
 green=`tput setaf 2`
 orange=`tput setaf 9`