Add local development build workflow

- Add Makefile targets: install, type-check, lint, build-local
- Add type-check script to backend/package.json
- Create backend/.gitignore for build artifacts

Enables quick TypeScript error detection without Docker rebuilds.

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Makefile

@@ -1,4 +1,4 @@
-.PHONY: help setup start stop clean logs shell-backend shell-frontend migrate rebuild traefik-dashboard traefik-logs service-discovery network-inspect health-check-all mobile-setup db-shell-app
+.PHONY: help setup start stop clean logs shell-backend shell-frontend migrate rebuild traefik-dashboard traefik-logs service-discovery network-inspect health-check-all mobile-setup db-shell-app install type-check lint build-local
 
 help:
 	@echo "MotoVaultPro - Simplified 5-Container Architecture"
@@ -25,6 +25,12 @@ help:
 	@echo ""
 	@echo "Database Access (Container-Only):"
 	@echo "  make db-shell-app      - Application database shell"
+	@echo ""
+	@echo "Local Development (No Docker):"
+	@echo "  make install       - Install npm dependencies locally"
+	@echo "  make type-check    - Run TypeScript type checks"
+	@echo "  make lint          - Run ESLint on all code"
+	@echo "  make build-local   - Build frontend and backend locally"
 
 setup:
 	@echo "Setting up MotoVaultPro K8s-ready development environment..."
@@ -194,3 +200,47 @@ db-import-file:
 db-backup:
 	@echo "Creating database backup..."
 	@./scripts/export-database.sh --output backup_$(shell date +%Y%m%d_%H%M%S)
+
+# =============================================================================
+# Local Development (No Docker Required)
+# =============================================================================
+# Use these commands to quickly check for TypeScript errors and linting issues
+# without rebuilding Docker containers.
+
+.PHONY: install type-check lint build-local
+
+install:
+	@echo "Installing dependencies locally..."
+	@cd frontend && npm install
+	@cd backend && npm install
+	@echo "Dependencies installed!"
+
+type-check:
+	@echo "Running TypeScript type checks..."
+	@echo "Frontend:"
+	@cd frontend && npm run type-check
+	@echo ""
+	@echo "Backend:"
+	@cd backend && npm run type-check
+	@echo ""
+	@echo "Type checks complete!"
+
+lint:
+	@echo "Running linters..."
+	@echo "Frontend:"
+	@cd frontend && npm run lint
+	@echo ""
+	@echo "Backend:"
+	@cd backend && npm run lint
+	@echo ""
+	@echo "Linting complete!"
+
+build-local:
+	@echo "Building frontend and backend locally..."
+	@echo "Frontend:"
+	@cd frontend && npm run build
+	@echo ""
+	@echo "Backend:"
+	@cd backend && npm run build
+	@echo ""
+	@echo "Build complete! Check frontend/dist and backend/dist"