GoogleCloudPlatform/microservices-demo — reverse-engineered prompt

Build me a cloud first demo ecommerce site called Online Boutique. I want users to open a web storefront, browse a catalog of products, search or view individual items, add things to a cart, see recommendations, change currencies, get shipping estimates, and go through a checkout flow with mock payment and a mock confirmation email.

Please make it feel like a realistic sample app for learning modern cloud deployments, not a real store with accounts. It should generate anonymous sessions automatically and keep carts working between pages. Split the main parts into separate services that talk to each other, including frontend, cart, product catalog, currency, payment, shipping, checkout, email, recommendations, ads, and a load generator that simulates shoppers.

Set it up so it can run on Kubernetes, especially Google Kubernetes Engine, with manifests and simple deploy instructions. Use gRPC where the services need to talk. Look up current docs online if you need to.