p 1 and 2 compeleted

apps/mobile/.env.example

@@ -1,14 +1,41 @@
+# =============================================================================
+# FitAI Mobile App Environment Configuration
+# =============================================================================
+# Copy this file to .env and fill in the values
+# All variables prefixed with EXPO_PUBLIC_ are accessible in the app code
+
+# =============================================================================
 # Clerk Authentication
-# Get these values from https://dashboard.clerk.com
-# Make sure to use the correct publishable key for your environment
-# IMPORTANT: Must start with EXPO_PUBLIC_ to be available in the app
+# =============================================================================
+# Get your publishable key from https://dashboard.clerk.com
+# Navigate to: API Keys > Copy Publishable Key
+# IMPORTANT: Use the correct key for your environment (development/production)
 EXPO_PUBLIC_CLERK_PUBLISHABLE_KEY=pk_test_your_publishable_key_here
 
+# =============================================================================
 # API Configuration
-# Development: Use ngrok or local network IP (e.g., http://192.168.1.100:3000)
-# Production: Use your production API URL
-EXPO_PUBLIC_API_URL=http://localhost:3000/api
+# =============================================================================
+# Backend API base URL (without /api suffix)
+# 
+# Options:
+# 1. Local development (emulator/simulator on same machine):
+#    EXPO_PUBLIC_API_URL=http://localhost:3000
+#
+# 2. Physical device or external testing (using ngrok):
+#    EXPO_PUBLIC_API_URL=https://your-ngrok-url.ngrok-free.app
+#    Start ngrok: ngrok http 3000
+#
+# 3. Local network (physical device on same WiFi):
+#    EXPO_PUBLIC_API_URL=http://192.168.1.100:3000
+#    Replace with your computer's local IP address
+#
+# 4. Production:
+#    EXPO_PUBLIC_API_URL=https://api.yourapp.com
+#
+EXPO_PUBLIC_API_URL=http://localhost:3000
 
-# App Configuration
+# =============================================================================
+# App Configuration (Optional)
+# =============================================================================
 EXPO_PUBLIC_APP_NAME=FitAI
 EXPO_PUBLIC_APP_VERSION=1.0.0