OK. App server is running.

API Endpoints:
  GET /v1/catalog/products?cursor=&limit=25&lang=en|ar
  GET /v1/catalog/products?sku=MK4820b (single product by SKU)
  GET /health
  GET /menus (all menus with nested items)
  GET /menu-path-by-sku?sku=MK4820b (product name + menu hierarchy)

OAuth:
  /auth?shop=YOURSTORE.myshopify.com