diff --git a/.env.example b/.env.example
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+# Authorize.net
+AUTHNET_API_LOGIN_ID=
+AUTHNET_TRANSACTION_KEY=
+AUTHNET_ENV=sandbox
+
+# Database (PostgreSQL)
+DATABASE_URL=postgresql://user:password@host:5432/dbname
+
+# Shopify Storefront API (read-only — for catalog import during migration)
+SHOPIFY_STOREFRONT_TOKEN=
+SHOPIFY_STORE_DOMAIN=yourstore.myshopify.com
+
+# App
+SESSION_SECRET=replace_with_long_random_string
+PORT=5000
+NODE_ENV=development