feat: add Makefile with comprehensive development commands (#101)

Adds convenient Make shortcuts for common development tasks:

Development:
- make install/dev/build/serve - Standard workflow commands

Code Quality:
- make lint/lint-fix/test - Linting and testing

Maintenance:
- make clean/clean-all/fresh/rebuild - Cleanup utilities

Dependencies:
- make audit/audit-fix/upgrade - Dependency management

Utilities:
- make version/info/help - Project information

All commands include color-coded output for better UX.
Updated README with comprehensive Makefile documentation.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: jongear

Makefile

@@ -0,0 +1,87 @@
+.PHONY: help install dev build lint serve clean test audit
+
+# Default target
+.DEFAULT_GOAL := help
+
+# Colors for output
+CYAN := \033[0;36m
+GREEN := \033[0;32m
+YELLOW := \033[0;33m
+RED := \033[0;31m
+NC := \033[0m # No Color
+
+help: ## Show this help message
+	@echo "$(CYAN)Available commands:$(NC)"
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "  $(GREEN)%-15s$(NC) %s\n", $$1, $$2}'
+
+install: ## Install dependencies
+	@echo "$(CYAN)Installing dependencies...$(NC)"
+	npm install
+
+ci-install: ## Clean install for CI/CD (uses package-lock.json)
+	@echo "$(CYAN)Running clean install...$(NC)"
+	npm ci
+
+dev: ## Start development server
+	@echo "$(CYAN)Starting development server...$(NC)"
+	npm run dev
+
+start: dev ## Alias for dev
+
+build: ## Build production site
+	@echo "$(CYAN)Building production site...$(NC)"
+	npm run build
+
+lint: ## Run ESLint
+	@echo "$(CYAN)Running linter...$(NC)"
+	npm run lint
+
+lint-fix: ## Run ESLint with auto-fix
+	@echo "$(CYAN)Running linter with auto-fix...$(NC)"
+	npm run lint:fix
+
+serve: ## Serve production build locally
+	@echo "$(CYAN)Serving production build...$(NC)"
+	npm run serve
+
+clean: ## Clean build artifacts and node_modules
+	@echo "$(CYAN)Cleaning build artifacts...$(NC)"
+	rm -rf public .cache
+	@echo "$(GREEN)Build artifacts cleaned!$(NC)"
+
+clean-all: clean ## Clean everything including node_modules
+	@echo "$(CYAN)Removing node_modules...$(NC)"
+	rm -rf node_modules package-lock.json
+	@echo "$(GREEN)All artifacts cleaned!$(NC)"
+
+audit: ## Run npm security audit
+	@echo "$(CYAN)Running security audit...$(NC)"
+	npm audit
+
+audit-fix: ## Fix npm security issues automatically
+	@echo "$(CYAN)Fixing security issues...$(NC)"
+	npm audit fix
+
+test: lint build ## Run all tests (lint + build)
+	@echo "$(GREEN)All tests passed!$(NC)"
+
+fresh: clean-all install ## Fresh install (clean + install)
+	@echo "$(GREEN)Fresh install complete!$(NC)"
+
+rebuild: clean build ## Clean rebuild
+	@echo "$(GREEN)Rebuild complete!$(NC)"
+
+upgrade: ## Update all dependencies to latest versions
+	@echo "$(YELLOW)Updating dependencies...$(NC)"
+	npm update
+	@echo "$(GREEN)Dependencies updated!$(NC)"
+
+version: ## Show current version from package.json
+	@node -p "'v' + require('./package.json').version"
+
+info: ## Show project information
+	@echo "$(CYAN)Project Information:$(NC)"
+	@echo "  Name:    $$(node -p "require('./package.json').name")"
+	@echo "  Version: $$(node -p "require('./package.json').version")"
+	@echo "  Node:    $$(node --version)"
+	@echo "  NPM:     $$(npm --version)"

README.md

@@ -48,6 +48,52 @@ The site will be available at `http://localhost:8000`
 - `npm run lint` - Run ESLint
 - `npm run serve` - Serve the production build locally
 
+### Makefile Commands
+
+For convenience, common tasks are available via Make commands. Run `make help` to see all available commands:
+
+```sh
+make help
+```
+
+#### Quick Reference
+
+**Development:**
+```sh
+make install      # Install dependencies
+make dev          # Start development server (alias: make start)
+make build        # Build production site
+make serve        # Serve production build locally
+```
+
+**Code Quality:**
+```sh
+make lint         # Run ESLint
+make lint-fix     # Auto-fix linting issues
+make test         # Run all tests (lint + build)
+```
+
+**Maintenance:**
+```sh
+make clean        # Clean build artifacts (.cache, public)
+make clean-all    # Clean everything including node_modules
+make fresh        # Fresh install (clean-all + install)
+make rebuild      # Clean rebuild (clean + build)
+```
+
+**Dependencies:**
+```sh
+make audit        # Run npm security audit
+make audit-fix    # Auto-fix security issues
+make upgrade      # Update all dependencies
+```
+
+**Utilities:**
+```sh
+make version      # Show current version
+make info         # Show project information
+```
+
 ## Deployment
 
 My site uses a comprehensive CI/CD pipeline with [GitHub Actions](https://docs.github.com/en/actions) and [Netlify](https://www.netlify.com/):