fix: update Dockerfile to use .NET 10 SDK and runtime

The project was upgraded to target .NET 10 but the Dockerfile was
still using .NET 9 images, causing build failures:
"error NETSDK1045: The current .NET SDK does not support targeting .NET 10.0"

Updated base images from mcr.microsoft.com/dotnet/{sdk,aspnet}:9.0
to mcr.microsoft.com/dotnet/{sdk,aspnet}:10.0

Co-Authored-By: claude-flow <ruv@ruv.net>

Author: Coder

Dockerfile

@@ -1,11 +1,11 @@
 #See https://aka.ms/containerfastmode to understand how Visual Studio uses this Dockerfile to build your images for faster debugging.
 
-FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS base
+FROM mcr.microsoft.com/dotnet/aspnet:10.0 AS base
 WORKDIR /app
 EXPOSE 80
 EXPOSE 443
 
-FROM mcr.microsoft.com/dotnet/sdk:9.0 AS build
+FROM mcr.microsoft.com/dotnet/sdk:10.0 AS build
 WORKDIR /src
 COPY ["SonosControl.Web/SonosControl.Web.csproj", "SonosControl.Web/"]
 COPY ["SonosControl.DAL/SonosControl.DAL.csproj", "SonosControl.DAL/"]