modify Makefile for dist

Makefile

@@ -47,6 +47,7 @@ init:
 clean:
 	@echo "빌드 결과물을 삭제합니다..."
 	@rm -rf $(BUILD_DIR)
+	@rm -rf ./out/**
 
 build: init $(TARGET_EXEC)
 	@echo "빌드 완료"
@@ -66,6 +67,7 @@ run: clean build
 	@echo "============"
 	@$(TARGET_EXEC)
 
-dist:
+dist: clean
 	mkdir -p out
-	zip -j -9 out/$(TARGET_NAME).zip $(TARGET_SRCS)
+	(cd $(SRC_DIR) && zip -9 $(TARGET_NAME).zip ./**)
+	mv $(SRC_DIR)/$(TARGET_NAME).zip out