Add verbose mode to code-sniff command

Author: nanoninja

Diff for: Makefile

@@ -40,7 +40,7 @@ clean:
 
 code-sniff:
 	@echo "Checking the standard code..."
-	@docker-compose exec -T php ./app/vendor/bin/phpcs --standard=PSR2 app/src
+	@docker-compose exec -T php ./app/vendor/bin/phpcs -v --standard=PSR2 app/src
 
 composer-up:
 	@docker run --rm -v $(shell pwd)/web/app:/app composer update