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.gitignore

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+# ===========================
+# Datacenter Designer
+# .gitignore
+# ===========================
+
+# Dependencies
+node_modules/
+package-lock.json  # Optional: Comment out if you want to commit lock file
+
+# Database Files (User Data - DO NOT COMMIT)
+database/*.db
+database/*.db-shm
+database/*.db-wal
+*.db
+*.db-shm
+*.db-wal
+
+# Exception: Allow sample database if you create one for demos
+# !database/sample.db
+
+# Logs
+logs/
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Environment Variables
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+.env*.local
+
+# IDE and Editor Files
+.vscode/
+.idea/
+*.swp
+*.swo
+*.swn
+*~
+.project
+.classpath
+.c9/
+*.launch
+.settings/
+*.sublime-workspace
+*.sublime-project
+
+# OS Files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+Desktop.ini
+
+# Build Outputs (if added later)
+dist/
+build/
+.cache/
+out/
+.next/
+.nuxt/
+
+# Temporary Files
+tmp/
+temp/
+*.tmp
+*.temp
+*.bak
+*.backup
+
+# Test Coverage
+coverage/
+.nyc_output/
+*.lcov
+
+# Runtime Data
+pids/
+*.pid
+*.seed
+*.pid.lock
+
+# Optional npm cache directory
+.npm/
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Yarn
+.yarn-integrity
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+# Claude-specific (optional - uncomment if needed)
+# .claude/
+# .claude/settings.local.json
+
+# macOS
+.AppleDouble
+.LSOverride
+
+# Windows
+[Dd]esktop.ini
+$RECYCLE.BIN/
+
+# Linux
+.directory
+.Trash-*
+
+# Archives (optional - uncomment if you don't want to track exports)
+# *.zip
+# *.tar.gz
+# *.rar
+# *.7z
+
+# Exported Files (optional - uncomment if you don't want to track exports)
+# exports/
+# *.json
+# *.xlsx
+
+# Documentation Build (if you add docs generation)
+docs/build/
+docs/_build/
+
+# Certificates and Keys (CRITICAL - DO NOT COMMIT)
+*.pem
+*.key
+*.crt
+*.cer
+*.p12
+*.pfx
+
+# Config Files with Secrets
+config.local.js
+secrets.json
+credentials.json