refactor: improve Makefile with variables (#34)

Author: yejiyang

Makefile

@@ -1,8 +1,13 @@
 # Makefile for Geospatial Dataset Publishing project
 
+COMPOSE ?= docker compose
+FRONTEND_DIR := frontend
+PYTHON ?= python3
+
 .PHONY: help docker-build docker-up docker-down docker-logs docker-clean docker-rebuild-frontend docker-up-frontend docker-up-backend docker-rebuild-backend frontend-build frontend-serve
 
-# Default target
+.DEFAULT_GOAL := help
+
 help:
 	@echo "Geospatial Dataset Publishing Project"
 	@echo ""
@@ -25,46 +30,46 @@ help:
 # Docker commands
 docker-build:
 	@echo "Building Docker images..."
-	docker-compose build
+	$(COMPOSE) build
 
 docker-up:
 	@echo "Starting Docker containers..."
-	docker-compose up -d
+	$(COMPOSE) up -d
 
 docker-down:
 	@echo "Stopping Docker containers..."
-	docker-compose down
+	$(COMPOSE) down
 
 docker-logs:
 	@echo "Viewing Docker logs..."
-	docker-compose logs -f
+	$(COMPOSE) logs -f
 
 docker-clean:
 	@echo "Cleaning Docker resources..."
-	docker-compose down --rmi all --volumes --remove-orphans
+	$(COMPOSE) down --rmi all --volumes --remove-orphans
 
 docker-rebuild-frontend:
 	@echo "Rebuilding frontend Docker container..."
-	docker-compose build --no-cache frontend
+	$(COMPOSE) build --no-cache frontend
 
 docker-up-frontend:
 	@echo "Starting frontend Docker container..."
-	docker-compose up -d frontend
+	$(COMPOSE) up -d frontend
 
 docker-up-backend:
 	@echo "Starting backend Docker container..."
-	docker-compose up -d backend
+	$(COMPOSE) up -d backend
 
 # Docker backend-specific commands
 docker-rebuild-backend:
 	@echo "Rebuilding backend Docker container (no cache)..."
-	docker-compose build --no-cache backend
+	$(COMPOSE) build --no-cache backend
 
 # Frontend development helpers
 frontend-build:
 	@echo "Building frontend..."
-	cd frontend && npm run build
+	cd $(FRONTEND_DIR) && npm run build
 
 frontend-serve:
 	@echo "Serving frontend locally on http://localhost:8080"
-	cd frontend/src && python3 -m http.server 8080
+	cd $(FRONTEND_DIR)/src && $(PYTHON) -m http.server 8080