Initial commit: Set up Garmin Health Lab project structure

- Initialize monorepo with root workspace configuration
- Set up Express.js backend with TypeScript
- Set up React 18 frontend with TypeScript
- Create database schema with SQLite
- Implement project architecture and documentation
- Add development and deployment guidelines

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

server/.env.example

@@ -0,0 +1,20 @@
+# Server Configuration
+PORT=5000
+NODE_ENV=development
+
+# Database
+DATABASE_PATH=./data/health.db
+
+# JWT
+JWT_SECRET=your_jwt_secret_key_here_change_in_production
+
+# CORS
+CORS_ORIGIN=http://localhost:3000
+
+# Garmin Configuration
+# Note: Consider using OAuth instead of storing credentials
+GARMIN_CONNECT_USER=your_garmin_email@example.com
+GARMIN_CONNECT_PASSWORD=your_password_here
+
+# Data Sync
+SYNC_INTERVAL_HOURS=1