build: add ui command to Makefile for shadcn components

Makefile

@@ -3,6 +3,8 @@
 ENV ?= dev
 COMPOSE_FILE = docker-compose$(if $(filter $(ENV),prod),.prod,).yml
 COMPOSE = docker compose -f $(COMPOSE_FILE)
+# Service name of the dev container
+SERVICE_NAME = app
 
 .PHONY: up stop build deploy logs
 
@@ -30,4 +32,7 @@ logs:
 	$(COMPOSE) logs -f
 
 clean:
-	docker image prune -f
+	docker image prune -f
+
+ui:
+	$(COMPOSE) exec $(SERVICE_NAME) npx shadcn@latest add $(component)