Add project files.

Core.Blueprint.DAL.Infrastrcture/Contracts/IProxyBlobStorage.cs

@@ -0,0 +1,11 @@
+using Core.Blueprint.Domain.Dtos;
+
+namespace Core.Blueprint.DAL.Infrastructure.Contracts
+{
+    public interface IProxyBlobStorage
+    {
+        IAsyncEnumerable<ImageUrlDto> ListAllItemsAsync();
+        Task<ImageUrlDto> GetFirstImageUrlAsync();
+        Task<ImageUrlDto> GetUploadUrl();
+    }
+}