auto-claude: subtask-1-1 - Create .env.example file with documented environme

.env.example

@@ -0,0 +1,12 @@
+# Supabase Configuration
+# Get these from your Supabase project settings: https://app.supabase.com
+NEXT_PUBLIC_SUPABASE_URL=https://your-project-id.supabase.co
+NEXT_PUBLIC_SUPABASE_ANON_KEY=your-supabase-anon-key-here
+
+# Analytics
+# Google Analytics tracking ID (format: G-XXXXXXXXXX)
+NEXT_PUBLIC_GA_TRACKING_ID=G-XXXXXXXXXX
+
+# Site Configuration
+# The public URL where your site is hosted (e.g., https://damjan-savic.com)
+NEXT_PUBLIC_SITE_URL=https://your-domain.com