vikesh-bansal/eCommerceSolution.OrdersService ? reverse-engineered prompt

Build me an orders service for an eCommerce app in C# as a small microservice solution.

I want a web API for creating, viewing, updating, and canceling orders, with a clean split between the API, business logic, and data access layers. It should be set up like a real backend service, with a solution file and Docker support so I can run it locally with compose. Please include sensible starter endpoints for order management, basic validation, and a simple way to store and retrieve order data.

If it makes sense, add an API gateway entry point for routing to the service, and keep the code organized so it would be easy to extend later with payment or inventory features. Use current .NET best practices, and look up current docs online if you need to. I mostly want a working foundation that I can run, test, and build on right away.