Review EF Core 1.0 code in the "Catalog" microservice (Simple data-driven and CRUD microservice)

[CESARDELATORRE]

Need to review and provide feedback on the EF Core 1.0 code in "Catalog" microservice by the EF product team.
Take into account that this microservice implementation is supposed to be "the simpler, the better", as it is a simple data-driven and CRUD microservice.

• "Catalog" microservice:
  -- Startup.cs:
  https://github.com/dotnet/eShopOnContainers/blob/master/src/Services/Catalog/Catalog.API/Startup.cs
  -- CatalogContext.cs:
  https://github.com/dotnet/eShopOnContainers/blob/master/src/Services/Catalog/Catalog.API/Infrastructure/CatalogContext.cs
  -- CatalogContextSeed.cs:
  https://github.com/dotnet/eShopOnContainers/blob/master/src/Services/Catalog/Catalog.API/Infrastructure/CatalogContextSeed.cs
  -- CatalogController.cs: (Actual Linq code)
  https://github.com/dotnet/eShopOnContainers/blob/master/src/Services/Catalog/Catalog.API/Controllers/CatalogController.cs